diff --git a/systemd-sslh-generator.c b/systemd-sslh-generator.c
index 315e207..6d6a44f 100644
--- a/systemd-sslh-generator.c
+++ b/systemd-sslh-generator.c
@@ -2,7 +2,13 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#include "common.h"
+
+#define CHECK_ALLOC(a, str) \
+    if (!a) { \
+        fprintf(stderr, "%s:%d:", __FILE__, __LINE__); \
+        perror(str); \
+        exit(1); \
+    }
 
 
 static char* resolve_listen(const char *hostname, const char *port) {