diff --git a/src/test/regress/regress.c b/src/test/regress/regress.c
index 8bc562ee4f0..7060b6fbf32 100644
--- a/src/test/regress/regress.c
+++ b/src/test/regress/regress.c
@@ -38,7 +38,6 @@
 #include "utils/memutils.h"
 
 
-#define P_MAXDIG 12
 #define LDELIM			'('
 #define RDELIM			')'
 #define DELIM			','