diff --git a/sql/gcalc_slicescan.h b/sql/gcalc_slicescan.h
index 5a0399bc8da..4996287ca88 100644
--- a/sql/gcalc_slicescan.h
+++ b/sql/gcalc_slicescan.h
@@ -26,7 +26,7 @@
 
 #ifndef GCALC_DBUG_OFF
 #define GCALC_DBUG_PRINT(b) DBUG_PRINT("Gcalc", b)
-#define GCALC_DBUG_ENTER(a) DBUG_ENTER("Gcalc "a)
+#define GCALC_DBUG_ENTER(a) DBUG_ENTER("Gcalc " a)
 #define GCALC_DBUG_RETURN(r) DBUG_RETURN(r)
 #define GCALC_DBUG_VOID_RETURN DBUG_VOID_RETURN
 #define GCALC_DBUG_ASSERT(r) DBUG_ASSERT(r)