diff --git a/src/c/funktionen.c b/src/c/funktionen.c
index 64a3479..3d33778 100644
--- a/src/c/funktionen.c
+++ b/src/c/funktionen.c
@@ -143,3 +143,14 @@ float logarithmPlusOne(float x) {
 	}
 }
 
+// Function to calculate the natural logarithm (base e) of a number and add 1
+float naturalLogarithmPlusOne(float x) {
+	if (x > 0) {
+		return log(x) + 1;
+	}
+	else {
+		printf("Error: Invalid input for natural logarithm + 1!\n");
+		return 0;
+	}
+}
+