diff --git a/src/gsm_utils.c b/src/gsm_utils.c
index 288d520..48d250e 100644
--- a/src/gsm_utils.c
+++ b/src/gsm_utils.c
@@ -37,6 +37,6 @@
 			b_off -= 8;
 		}
 	}
-	text[i] = 0;
+	text[i] = '\0';
 	return text;
 }