diff --git a/build_tools/cflags.xml b/build_tools/cflags.xml
index a43daa0ae8..ea741531a6 100644
--- a/build_tools/cflags.xml
+++ b/build_tools/cflags.xml
@@ -89,7 +89,6 @@
 			<support_level>extended</support_level>
 			<conflict>THREAD_SANITIZER</conflict>
 			<conflict>LEAK_SANITIZER</conflict>
-			<conflict>UNDEFINED_SANITIZER</conflict>
 			<conflict>MALLOC_DEBUG</conflict>
 			<conflict>DEBUG_CHAOS</conflict>
 		</member>
@@ -98,23 +97,18 @@
 			<support_level>extended</support_level>
 			<conflict>ADDRESS_SANITIZER</conflict>
 			<conflict>LEAK_SANITIZER</conflict>
-			<conflict>UNDEFINED_SANITIZER</conflict>
 		</member>
 		<member name="LEAK_SANITIZER" displayname="Leak Sanitizer">
 			<depend>HAVE_LEAK_SANITIZER</depend>
 			<support_level>extended</support_level>
 			<conflict>ADDRESS_SANITIZER</conflict>
 			<conflict>THREAD_SANITIZER</conflict>
-			<conflict>UNDEFINED_SANITIZER</conflict>
 			<conflict>MALLOC_DEBUG</conflict>
 			<conflict>DEBUG_CHAOS</conflict>
 		</member>
 		<member name="UNDEFINED_SANITIZER" displayname="Undefined Behavior Sanitizer">
 			<depend>HAVE_UNDEFINED_SANITIZER</depend>
 			<support_level>extended</support_level>
-			<conflict>ADDRESS_SANITIZER</conflict>
-			<conflict>THREAD_SANITIZER</conflict>
-			<conflict>LEAK_SANITIZER</conflict>
 		</member>
 		<member name="BUSYDETECT_TONEONLY" displayname="Enable additional comparision of only the tone duration not the silence part">
 			<conflict>BUSYDETECT_COMPARE_TONE_AND_SILENCE</conflict>