diff --git a/src/c/funktionen.h b/src/c/funktionen.h
index 82dc677..43f26bd 100644
--- a/src/c/funktionen.h
+++ b/src/c/funktionen.h
@@ -68,4 +68,7 @@ float naturalLogarithmPlusOne(float x);
 // Function to calculate the square root of a number and add 1
 float squareRootPlusOne(float x);
 
+// Function to calculate the cube root of a number and add 1
+float cubeRootPlusOne(float x);
+
 #endif
\ No newline at end of file