diff --git a/src/decbinary.c b/src/decbinary.c
index 672b2f6..00ff176 100644
--- a/src/decbinary.c
+++ b/src/decbinary.c
@@ -1,2 +1,4 @@
 #include <stdio.h>
 #include "decbinary.h"
+
+int dezimal_zu_binär(int dezimalzahl);