diff --git a/src/main/c/calculator.h b/src/main/c/calculator.h
new file mode 100644
index 0000000..ec9e08f
--- /dev/null
+++ b/src/main/c/calculator.h
@@ -0,0 +1,6 @@
+#ifndef CALCULATOR_H
+#define CALCULATOR_H
+
+int add(int a, int b);
+
+#endif // CALCULATOR_H
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
deleted file mode 100644
index 1261fd7..0000000
--- a/src/main/c/taschenrechner.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef TASCHENRECHNER_H
-#define TASCHENRECHNER_H
-
-int add(int a, int b);
-
-#endif // TASCHENRECHNER_H