diff --git a/src/hnsw.h b/src/hnsw.h
index e8d1423..f265c7c 100644
--- a/src/hnsw.h
+++ b/src/hnsw.h
@@ -105,6 +105,11 @@ typedef Pointer Item;
 #define SeedRandom(seed) srandom(seed)
 #endif
 
+#if PG_VERSION_NUM < 160000
+#define palloc_object(type) ((type *) palloc(sizeof(type)))
+#define palloc0_object(type) ((type *) palloc0(sizeof(type)))
+#endif
+
 #define HnswIsElementTuple(tup) ((tup)->type == HNSW_ELEMENT_TUPLE_TYPE)
 #define HnswIsNeighborTuple(tup) ((tup)->type == HNSW_NEIGHBOR_TUPLE_TYPE)
 
diff --git a/src/hnswbuild.c b/src/hnswbuild.c
index 7b1bf2a..7d19146 100644
--- a/src/hnswbuild.c
+++ b/src/hnswbuild.c
@@ -930,7 +930,7 @@ HnswBeginParallel(HnswBuildState * buildstate, bool isconcurrent, int request)
 	Size		estother;
 	HnswShared *hnswshared;
 	char	   *hnswarea;
-	HnswLeader *hnswleader = (HnswLeader *) palloc0(sizeof(HnswLeader));
+	HnswLeader *hnswleader = palloc0_object(HnswLeader);
 	bool		leaderparticipates = true;
 	int			querylen;
 
@@ -1151,7 +1151,7 @@ hnswbuild(Relation heap, Relation index, IndexInfo *indexInfo)
 
 	BuildIndex(heap, index, indexInfo, &buildstate, MAIN_FORKNUM);
 
-	result = (IndexBuildResult *) palloc(sizeof(IndexBuildResult));
+	result = palloc_object(IndexBuildResult);
 	result->heap_tuples = buildstate.reltuples;
 	result->index_tuples = buildstate.indtuples;
 
diff --git a/src/hnswscan.c b/src/hnswscan.c
index 32cdb7d..1c50efb 100644
--- a/src/hnswscan.c
+++ b/src/hnswscan.c
@@ -136,7 +136,7 @@ hnswbeginscan(Relation index, int nkeys, int norderbys)
 
 	scan = RelationGetIndexScan(index, nkeys, norderbys);
 
-	so = (HnswScanOpaque) palloc(sizeof(HnswScanOpaqueData));
+	so = palloc_object(HnswScanOpaqueData);
 	so->typeInfo = HnswGetTypeInfo(index);
 
 	/* Set support functions */
diff --git a/src/hnswutils.c b/src/hnswutils.c
index 896e66d..ac36d2a 100644
--- a/src/hnswutils.c
+++ b/src/hnswutils.c
@@ -282,7 +282,7 @@ HnswAddHeapTid(HnswElement element, ItemPointer heaptid)
 HnswElement
 HnswInitElementFromBlock(BlockNumber blkno, OffsetNumber offno)
 {
-	HnswElement element = palloc(sizeof(HnswElementData));
+	HnswElement element = palloc_object(HnswElementData);
 	char	   *base = NULL;
 
 	element->blkno = blkno;
@@ -596,7 +596,7 @@ GetElementDistance(char *base, HnswElement element, HnswQuery * q, HnswSupport *
 static HnswSearchCandidate *
 HnswInitSearchCandidate(char *base, HnswElement element, double distance)
 {
-	HnswSearchCandidate *sc = palloc(sizeof(HnswSearchCandidate));
+	HnswSearchCandidate *sc = palloc_object(HnswSearchCandidate);
 
 	HnswPtrStore(base, sc->element, element);
 	sc->distance = distance;
@@ -1328,7 +1328,7 @@ HnswFindElementNeighbors(char *base, HnswElement element, HnswElement entryPoint
 		foreach(lc2, w)
 		{
 			HnswSearchCandidate *sc = lfirst(lc2);
-			HnswCandidate *hc = palloc(sizeof(HnswCandidate));
+			HnswCandidate *hc = palloc_object(HnswCandidate);
 
 			hc->element = sc->element;
 			hc->distance = sc->distance;
diff --git a/src/hnswvacuum.c b/src/hnswvacuum.c
index 804a573..88905db 100644
--- a/src/hnswvacuum.c
+++ b/src/hnswvacuum.c
@@ -737,7 +737,7 @@ InitVacuumState(HnswVacuumState * vacuumstate, IndexVacuumInfo *info, IndexBulkD
 	Relation	index = info->index;
 
 	if (stats == NULL)
-		stats = (IndexBulkDeleteResult *) palloc0(sizeof(IndexBulkDeleteResult));
+		stats = palloc0_object(IndexBulkDeleteResult);
 
 	vacuumstate->index = index;
 	vacuumstate->stats = stats;
diff --git a/src/ivfbuild.c b/src/ivfbuild.c
index d3f0a7d..dd540b2 100644
--- a/src/ivfbuild.c
+++ b/src/ivfbuild.c
@@ -662,7 +662,7 @@ IvfflatParallelScanAndSort(IvfflatSpool * ivfspool, IvfflatShared * ivfshared, S
 	IndexInfo  *indexInfo;
 
 	/* Initialize local tuplesort coordination state */
-	coordinate = palloc0(sizeof(SortCoordinateData));
+	coordinate = palloc0_object(SortCoordinateData);
 	coordinate->isWorker = true;
 	coordinate->nParticipants = -1;
 	coordinate->sharedsort = sharedsort;
@@ -757,7 +757,7 @@ IvfflatParallelBuildMain(dsm_segment *seg, shm_toc *toc)
 	indexRel = index_open(ivfshared->indexrelid, indexLockmode);
 
 	/* Initialize worker's own spool */
-	ivfspool = (IvfflatSpool *) palloc0(sizeof(IvfflatSpool));
+	ivfspool = palloc0_object(IvfflatSpool);
 	ivfspool->heap = heapRel;
 	ivfspool->index = indexRel;
 
@@ -812,7 +812,7 @@ IvfflatLeaderParticipateAsWorker(IvfflatBuildState * buildstate)
 	int			sortmem;
 
 	/* Allocate memory and initialize private spool */
-	leaderworker = (IvfflatSpool *) palloc0(sizeof(IvfflatSpool));
+	leaderworker = palloc0_object(IvfflatSpool);
 	leaderworker->heap = buildstate->heap;
 	leaderworker->index = buildstate->index;
 
@@ -838,7 +838,7 @@ IvfflatBeginParallel(IvfflatBuildState * buildstate, bool isconcurrent, int requ
 	IvfflatShared *ivfshared;
 	Sharedsort *sharedsort;
 	char	   *ivfcenters;
-	IvfflatLeader *ivfleader = (IvfflatLeader *) palloc0(sizeof(IvfflatLeader));
+	IvfflatLeader *ivfleader = palloc0_object(IvfflatLeader);
 	bool		leaderparticipates = true;
 	int			querylen;
 
@@ -987,7 +987,7 @@ AssignTuples(IvfflatBuildState * buildstate)
 	/* Set up coordination state if at least one worker launched */
 	if (buildstate->ivfleader)
 	{
-		coordinate = (SortCoordinate) palloc0(sizeof(SortCoordinateData));
+		coordinate = palloc0_object(SortCoordinateData);
 		coordinate->isWorker = false;
 		coordinate->nParticipants = buildstate->ivfleader->nparticipanttuplesorts;
 		coordinate->sharedsort = buildstate->ivfleader->sharedsort;
@@ -1072,7 +1072,7 @@ ivfflatbuild(Relation heap, Relation index, IndexInfo *indexInfo)
 
 	BuildIndex(heap, index, indexInfo, &buildstate, MAIN_FORKNUM);
 
-	result = (IndexBuildResult *) palloc(sizeof(IndexBuildResult));
+	result = palloc_object(IndexBuildResult);
 	result->heap_tuples = buildstate.reltuples;
 	result->index_tuples = buildstate.indtuples;
 
diff --git a/src/ivfflat.h b/src/ivfflat.h
index a04585a..6a628f7 100644
--- a/src/ivfflat.h
+++ b/src/ivfflat.h
@@ -89,6 +89,11 @@ typedef Pointer Item;
 #define SeedRandom(seed) srandom(seed)
 #endif
 
+#if PG_VERSION_NUM < 160000
+#define palloc_object(type) ((type *) palloc(sizeof(type)))
+#define palloc0_object(type) ((type *) palloc0(sizeof(type)))
+#endif
+
 /* Variables */
 extern int	ivfflat_probes;
 extern int	ivfflat_iterative_scan;
diff --git a/src/ivfscan.c b/src/ivfscan.c
index 35b10f3..00aad28 100644
--- a/src/ivfscan.c
+++ b/src/ivfscan.c
@@ -276,7 +276,7 @@ ivfflatbeginscan(Relation index, int nkeys, int norderbys)
 	if (maxProbes > lists)
 		maxProbes = lists;
 
-	so = (IvfflatScanOpaque) palloc(sizeof(IvfflatScanOpaqueData));
+	so = palloc_object(IvfflatScanOpaqueData);
 	so->typeInfo = IvfflatGetTypeInfo(index);
 	so->first = true;
 	so->probes = probes;
diff --git a/src/ivfutils.c b/src/ivfutils.c
index 02e0839..534cb24 100644
--- a/src/ivfutils.c
+++ b/src/ivfutils.c
@@ -31,7 +31,7 @@ VectorArrayInit(int maxlen, int dimensions, Size itemsize)
 	/* Ensure items are aligned to prevent UB */
 	itemsize = MAXALIGN(itemsize);
 
-	res = palloc(sizeof(VectorArrayData));
+	res = palloc_object(VectorArrayData);
 	res->length = 0;
 	res->maxlen = maxlen;
 	res->dim = dimensions;
diff --git a/src/ivfvacuum.c b/src/ivfvacuum.c
index 5408609..088770f 100644
--- a/src/ivfvacuum.c
+++ b/src/ivfvacuum.c
@@ -24,7 +24,7 @@ ivfflatbulkdelete(IndexVacuumInfo *info, IndexBulkDeleteResult *stats,
 	BufferAccessStrategy bas = GetAccessStrategy(BAS_BULKREAD);
 
 	if (stats == NULL)
-		stats = (IndexBulkDeleteResult *) palloc0(sizeof(IndexBulkDeleteResult));
+		stats = palloc0_object(IndexBulkDeleteResult);
 
 	/* Iterate over list pages */
 	while (BlockNumberIsValid(blkno))