diff --git a/src/objectHandler.c b/src/objectHandler.c
index a4b2564..3c54b53 100644
--- a/src/objectHandler.c
+++ b/src/objectHandler.c
@@ -3,6 +3,7 @@
 #include <GL/glew.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <assert.h>
 
 /**
  * Loads an object.
diff --git a/src/shader.c b/src/shader.c
index 931b81b..e09d8f2 100644
--- a/src/shader.c
+++ b/src/shader.c
@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <GL/glew.h>
 #include "shader.h"
+#include <assert.h>
 
 void compileShader(const GLchar *shaderSource, Shader *shader) {
     assert(shaderSource != NULL);