diff --git a/src/nice.c b/src/nice.c
index ead879416..0a9209781 100644
--- a/src/nice.c
+++ b/src/nice.c
@@ -20,7 +20,6 @@
 #include <config.h>
 #include <stdio.h>
 
-#define NDEBUG
 #include <assert.h>
 
 #include <getopt.h>