diff --git a/src/bitutils.h b/src/bitutils.h
index 66924bf..db362e1 100644
--- a/src/bitutils.h
+++ b/src/bitutils.h
@@ -3,13 +3,13 @@
 
 #include "postgres.h"
 
-#include "halfvec.h"			/* for USE_DISPATCH and USE_TARGET_CLONES */
-
 /* Check version in first header */
 #if PG_VERSION_NUM < 120000
 #error "Requires PostgreSQL 12+"
 #endif
 
+#include "halfvec.h"			/* for USE_DISPATCH and USE_TARGET_CLONES */
+
 #if defined(USE_DISPATCH)
 #define BIT_DISPATCH
 #endif