diff --git a/src/hnsw.h b/src/hnsw.h
index bfd2049..a042dd8 100644
--- a/src/hnsw.h
+++ b/src/hnsw.h
@@ -93,6 +93,9 @@
 
 #define HnswGetValue(base, element) PointerGetDatum(HnswPtrAccess(base, (element)->value))
 
+#define HnswGetSearchCandidate(membername, ptr) pairingheap_container(HnswSearchCandidate, membername, ptr)
+#define HnswGetSearchCandidateConst(membername, ptr) pairingheap_const_container(HnswSearchCandidate, membername, ptr)
+
 #if PG_VERSION_NUM < 140005
 #define relptr_offset(rp) ((rp).relptr_off - 1)
 #endif
@@ -176,9 +179,6 @@ typedef struct HnswSearchCandidate
 	double		distance;
 }			HnswSearchCandidate;
 
-#define HnswGetSearchCandidate(membername, ptr) pairingheap_container(HnswSearchCandidate, membername, ptr)
-#define HnswGetSearchCandidateConst(membername, ptr) pairingheap_const_container(HnswSearchCandidate, membername, ptr)
-
 /* HNSW index options */
 typedef struct HnswOptions
 {
@@ -358,6 +358,12 @@ typedef union
 	struct tidhash_hash *tids;
 }			visited_hash;
 
+typedef union
+{
+	HnswElement element;
+	ItemPointerData indextid;
+}			HnswUnvisited;
+
 typedef struct HnswScanOpaqueData
 {
 	const		HnswTypeInfo *typeInfo;
diff --git a/src/hnswutils.c b/src/hnswutils.c
index fb35563..732fcd7 100644
--- a/src/hnswutils.c
+++ b/src/hnswutils.c
@@ -100,12 +100,6 @@ hash_offset(Size offset)
 #define SH_DEFINE
 #include "lib/simplehash.h"
 
-typedef union
-{
-	HnswElement element;
-	ItemPointerData indextid;
-}			HnswUnvisited;
-
 /*
  * Get the max number of connections in an upper layer for each element in the index
  */