diff --git a/src/confid.cpp b/src/confid.cpp
index 50b0a5d..69d7332 100644
--- a/src/confid.cpp
+++ b/src/confid.cpp
@@ -4,8 +4,6 @@
 
 #include "header.h"
 
-#define assert(x) /*nothing*/
-
 typedef int64_t i64;
 typedef uint64_t ui64;
 
diff --git a/src/header.h b/src/header.h
index 44a5b48..61d5d6d 100644
--- a/src/header.h
+++ b/src/header.h
@@ -5,11 +5,17 @@
 #ifndef WINDOWSXPKG_HEADER_H
 #define WINDOWSXPKG_HEADER_H
 
+#ifdef DEBUG
 #include <cassert>
+#else
+#define assert(x) /* nothing */
+#endif
+
 #include <cstdint>
 #include <cstdlib>
 #include <cstring>
 #include <ctime>
+
 #include <random>
 #include <iostream>
 #include <fstream>