diff --git a/src/utilities/gsec/call_service.cpp b/src/utilities/gsec/call_service.cpp
index 679e77f456..839fb60f7c 100644
--- a/src/utilities/gsec/call_service.cpp
+++ b/src/utilities/gsec/call_service.cpp
@@ -559,7 +559,7 @@ static int typeBuffer(ISC_STATUS* status, char* buf, int offset,
 	// Old data left - use them
 	if (offset)
 	{
-		memmove(&buf[offset], p, loop);
+		memmove(&buf[offset], p, loop + 1);
 		p = buf;
 		loop += offset;
 		offset = 0;