diff --git a/toxcore/DHT.c b/toxcore/DHT.c
index ae61d988..b09ea0c9 100644
--- a/toxcore/DHT.c
+++ b/toxcore/DHT.c
@@ -27,6 +27,10 @@
 #include "config.h"
 #endif
 
+#ifdef DEBUG
+#include <assert.h>
+#endif
+
 #include "logger.h"
 
 #include "DHT.h"
diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index 15df3419..3f913d4c 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -25,6 +25,10 @@
 #include "config.h"
 #endif
 
+#ifdef DEBUG
+#include <assert.h>
+#endif
+
 #include "logger.h"
 #include "Messenger.h"
 #include "assoc.h"