diff --git a/complex.c b/complex.c
index 560d9788b2..d775e38259 100644
--- a/complex.c
+++ b/complex.c
@@ -15,8 +15,6 @@
 #include <ctype.h>
 #include <math.h>
 
-#undef NDEBUG
-#define NDEBUG
 #include "id.h"
 #include "internal.h"
 #include "internal/array.h"
diff --git a/rational.c b/rational.c
index ae134da79f..4a7df253a5 100644
--- a/rational.c
+++ b/rational.c
@@ -20,8 +20,6 @@
 #include <gmp.h>
 #endif
 
-#undef NDEBUG
-#define NDEBUG
 #include "id.h"
 #include "internal.h"
 #include "internal/array.h"