diff --git a/src/c/funktionen.h b/src/c/funktionen.h
index 40ce9c4..d2387c9 100644
--- a/src/c/funktionen.h
+++ b/src/c/funktionen.h
@@ -31,4 +31,7 @@ int factorial(int x);
 // Function to calculate the floor value of a number
 float floorValue(float x);
 
+// Function to calculate the ceiling value of a number
+float ceilingValue(float x);
+
 #endif
\ No newline at end of file