diff --git a/CHANGELOG.md b/CHANGELOG.md
index 23865e0..35cc519 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## 0.4.2 (unreleased)
 
 - Added notice when index created with little data
+- Fixed installation error with Postgres 12.0-12.2
 
 ## 0.4.1 (2023-03-21)
 
diff --git a/src/vector.c b/src/vector.c
index 8ba1952..7c128e5 100644
--- a/src/vector.c
+++ b/src/vector.c
@@ -100,7 +100,7 @@ CheckStateArray(ArrayType *statearray, const char *caller)
 	return (float8 *) ARR_DATA_PTR(statearray);
 }
 
-#if PG_VERSION_NUM < 120000
+#if PG_VERSION_NUM < 120003
 static pg_noinline void
 float_overflow_error(void)
 {