diff --git a/src/fsfw/globalfunctions/DleParser.cpp b/src/fsfw/globalfunctions/DleParser.cpp
index b992debd..88d1dfb2 100644
--- a/src/fsfw/globalfunctions/DleParser.cpp
+++ b/src/fsfw/globalfunctions/DleParser.cpp
@@ -68,7 +68,7 @@ ReturnValue_t DleParser::parseRingBuf(size_t& readSize) {
           ctx.setType(ContextType::PACKET_FOUND);
           ctx.decodedPacket.first = decodedBuf.first;
           ctx.decodedPacket.second = decodedLen;
-          readSize = vectorIdx + 1;
+          readSize = ++vectorIdx;
           return returnvalue::OK;
         } else {
           // invalid packet, skip.