diff --git a/cper-parse.c b/cper-parse.c
index 0eaebe4..9bfdb40 100644
--- a/cper-parse.c
+++ b/cper-parse.c
@@ -133,7 +133,8 @@
 	//If a timestamp exists according to validation bits, then add it.
 	if (header->ValidationBits & 0x2) {
 		char timestamp_string[TIMESTAMP_LENGTH];
-		timestamp_to_string(timestamp_string, &header->TimeStamp);
+		timestamp_to_string(timestamp_string, TIMESTAMP_LENGTH,
+				    &header->TimeStamp);
 
 		json_object_object_add(
 			header_ir, "timestamp",