diff --git a/lib.c b/lib.c
index 3c1a0d9..72afd79 100644
--- a/lib.c
+++ b/lib.c
@@ -582,6 +582,7 @@ static int snprintf_error_data(char *buf, size_t len, uint8_t err,
 				return n;
 			}
 			n += tmp_n;
+			count++;
 		}
 	}