diff --git a/lib/com_err/parse.y b/lib/com_err/parse.y
index d64681d90..3472f82e0 100644
--- a/lib/com_err/parse.y
+++ b/lib/com_err/parse.y
@@ -46,6 +46,9 @@ extern char *yytext;
 #define alloca(x) malloc(x)
 #endif
 
+#define YYMALLOC malloc
+#define YYFREE free
+
 %}
 
 %union {