diff --git a/src/main/c/testForOperator.c b/src/main/c/testForOperator.c
index 0ad34c6..d3a7c1f 100644
--- a/src/main/c/testForOperator.c
+++ b/src/main/c/testForOperator.c
@@ -4,7 +4,7 @@
 #include <math.h>
 #include <stdbool.h>
 
-#include "taschenrechner.h"
+#include "calculator.h"
 
 char testForOperator() {
     //saving the number of operators in a variable so it only needs to be changed in one location
@@ -26,4 +26,4 @@ char testForOperator() {
         //if the input was deemed invalid it asks for new input and goes to the top of the while loop
         printf("The input was not allowed. Please try again!\n");
     }
-}
\ No newline at end of file
+}