diff --git a/src/main.c b/src/main.c
index 3af7663d30..276718b54a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -4646,7 +4646,7 @@ static void memory_tracking_init(void)
   }
 }
 #else
-#  define memory_tracking_init(x)
+#  define memory_tracking_init()
 #endif
 
 static int
diff --git a/tests/libtest/first.c b/tests/libtest/first.c
index 3785fd997a..f35528f710 100644
--- a/tests/libtest/first.c
+++ b/tests/libtest/first.c
@@ -83,7 +83,7 @@ static void memory_tracking_init(void)
   }
 }
 #else
-#  define memory_tracking_init(x)
+#  define memory_tracking_init()
 #endif
 
 int main(int argc, char **argv)