diff --git a/build_tools/cflags.xml b/build_tools/cflags.xml
index 0b8852b16a..1ebbeb9784 100644
--- a/build_tools/cflags.xml
+++ b/build_tools/cflags.xml
@@ -68,7 +68,6 @@
 			<support_level>extended</support_level>
 			<conflict>THREAD_SANITIZER</conflict>
 			<conflict>LEAK_SANITIZER</conflict>
-			<conflict>UNDEFINED_SANITIZER</conflict>
 			<conflict>MALLOC_DEBUG</conflict>
 		</member>
 		<member name="THREAD_SANITIZER" displayname="Thread Sanitizer">
@@ -76,22 +75,17 @@
 			<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>
 		</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>