diff --git a/scst/src/scst_mem.c b/scst/src/scst_mem.c
index c39db2900..2ae96d5c9 100644
--- a/scst/src/scst_mem.c
+++ b/scst/src/scst_mem.c
@@ -339,7 +339,7 @@ out_unlock_put:
 	goto out;
 }
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35) && RHEL_MAJOR -0 < 6
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35) && (!defined(RHEL_MAJOR) || RHEL_MAJOR -0 < 6)
 static int sgv_shrink(int nr, gfp_t gfpm)
 #else
 static int sgv_shrink(struct shrinker *shrinker, int nr, gfp_t gfpm)