Index: src/runtime/class.m
==================================================================
--- src/runtime/class.m
+++ src/runtime/class.m
@@ -20,12 +20,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <limits.h>
 
-#include <assert.h>
-
 #import "ObjFW_RT.h"
 #import "private.h"
 
 static struct objc_hashtable *classes = NULL;
 static unsigned classes_cnt = 0;
@@ -582,11 +580,11 @@
 
 	if ((ret = malloc((classes_cnt + 1) * sizeof(Class))) == NULL)
 		OBJC_ERROR("Failed to allocate memory for class list!");
 
 	count = objc_getClassList(ret, classes_cnt);
-	assert(count == classes_cnt);
+	OF_ENSURE(count == classes_cnt);
 
 	ret[count] = Nil;
 
 	if (len != NULL)
 		*len = count;
@@ -918,11 +916,11 @@
 			 */
 			i = UINT32_MAX;
 		}
 	}
 
-	assert(classes_cnt == 0);
+	OF_ENSURE(classes_cnt == 0);
 
 	if (empty_dtable != NULL) {
 		objc_dtable_free(empty_dtable);
 		empty_dtable = NULL;
 	}