diff --git a/src/rum_arr_utils.c b/src/rum_arr_utils.c
index 19277b4676..9f901000bf 100644
--- a/src/rum_arr_utils.c
+++ b/src/rum_arr_utils.c
@@ -72,7 +72,7 @@
 #define DIST_FROM_SML(sml) \
 	( (sml == 0.0) ? get_float8_infinity() : ((float8) 1) / ((float8) (sml)) )
 
-#if PG_VERSION_NUM <= 100000
+#if PG_VERSION_NUM < 110000
 #define HASHSTANDARD_PROC HASHPROC
 #endif