diff --git a/src/test/c/test_taschenrechner.c b/src/test/c/test_taschenrechner.c
index d3fc8c9..26b77be 100644
--- a/src/test/c/test_taschenrechner.c
+++ b/src/test/c/test_taschenrechner.c
@@ -2,7 +2,7 @@
 
 #include "unity.h"
 
-#include "taschenrechner.h"
+#include "calculator.h"
 
 void setUp(void)
 {