diff --git a/src/halfvec.c b/src/halfvec.c
index 4154584..ec53b21 100644
--- a/src/halfvec.c
+++ b/src/halfvec.c
@@ -27,7 +27,7 @@
 #include "parser/scansup.h"
 #endif
 
-#if PG_VERSION_NUM < 140600
+#if PG_VERSION_NUM < 140006
 #define palloc_array(type, count) ((type *) palloc(sizeof(type) * (count)))
 #endif
 
diff --git a/src/hnsw.h b/src/hnsw.h
index b7eee62..18726b5 100644
--- a/src/hnsw.h
+++ b/src/hnsw.h
@@ -105,7 +105,7 @@ typedef Pointer Item;
 #define SeedRandom(seed) srandom(seed)
 #endif
 
-#if PG_VERSION_NUM < 140600
+#if PG_VERSION_NUM < 140006
 #define palloc_object(type) ((type *) palloc(sizeof(type)))
 #define palloc0_object(type) ((type *) palloc0(sizeof(type)))
 #define palloc_array(type, count) ((type *) palloc(sizeof(type) * (count)))
diff --git a/src/ivfflat.h b/src/ivfflat.h
index 2db682d..bfff2ac 100644
--- a/src/ivfflat.h
+++ b/src/ivfflat.h
@@ -89,7 +89,7 @@ typedef Pointer Item;
 #define SeedRandom(seed) srandom(seed)
 #endif
 
-#if PG_VERSION_NUM < 140600
+#if PG_VERSION_NUM < 140006
 #define palloc_object(type) ((type *) palloc(sizeof(type)))
 #define palloc0_object(type) ((type *) palloc0(sizeof(type)))
 #define palloc_array(type, count) ((type *) palloc(sizeof(type) * (count)))
diff --git a/src/sparsevec.c b/src/sparsevec.c
index 89678f3..ef4796f 100644
--- a/src/sparsevec.c
+++ b/src/sparsevec.c
@@ -26,7 +26,7 @@
 #include "parser/scansup.h"
 #endif
 
-#if PG_VERSION_NUM < 140600
+#if PG_VERSION_NUM < 140006
 #define palloc_array(type, count) ((type *) palloc(sizeof(type) * (count)))
 #endif
 
diff --git a/src/vector.c b/src/vector.c
index 0d4530e..ded309c 100644
--- a/src/vector.c
+++ b/src/vector.c
@@ -30,7 +30,7 @@
 #include "parser/scansup.h"
 #endif
 
-#if PG_VERSION_NUM < 140600
+#if PG_VERSION_NUM < 140006
 #define palloc_array(type, count) ((type *) palloc(sizeof(type) * (count)))
 #endif