diff --git a/src/backend.cmod b/src/backend.cmod
index 24e9d23981d7f51a6cea63c9473547ee6d552737..9a1c419f7c10c473f4ec4117c6fa62c9398783a7 100644
--- a/src/backend.cmod
+++ b/src/backend.cmod
@@ -2908,7 +2908,7 @@ static void sb_copy_selectors(struct sb_active_selectors *to,
 #define PDB_CHECK_ERROR_EVENT(EVENT, MASK)	PDB_CHECK_EVENT(EVENT, MASK)
 #endif /* PB_CHECK_ERROR_EVENT */
 
-#ifdef RBBAND_IS_SPECIAL
+#ifdef RDBAND_IS_SPECIAL
 #  define pb_MY_FD_CLR_RDBAND(SET, FD) pb_MY_FD_CLR (SET, FD, MY_POLLRDBAND)
 #else
 #  define pb_MY_FD_CLR_RDBAND(SET, FD)