diff --git a/src/processor.cc b/src/processor.cc
index 6b5765392a38c3e59e05c7d065acbe2127c857e4..9d5b37f955254e96408dd00e1c74dffdcb0ad823 100644
--- a/src/processor.cc
+++ b/src/processor.cc
@@ -81,7 +81,7 @@ inline std::pair<uint32_t, bool> StreamProcessor::ProcessOrbitHeader(char* rd_pt
 	//save warning_test_enable bit
 	bool warning_test_enable = bool{(orbitN & (1 << 31)) == (1 << 31)};
 	//remove warning_test_enable bit from orbit header
-	orbitN &= 0x8fffffff;
+	orbitN &= 0x7fffffff;
 	std::pair<uint32_t, bool> orbit_header  = std::pair<uint32_t, bool>{orbitN, warning_test_enable};	
 	return orbit_header;
 }