diff --git a/build_tools/cflags.xml b/build_tools/cflags.xml
index 49a3547672..1a2e78ff87 100644
--- a/build_tools/cflags.xml
+++ b/build_tools/cflags.xml
@@ -77,6 +77,7 @@
 			<support_level>extended</support_level>
 		</member>
 		<member name="MALLOC_DEBUG" displayname="Keep Track of Memory Allocations">
+			<conflict>DEBUG_CHAOS</conflict>
 			<support_level>core</support_level>
 		</member>
 		<member name="DEBUG_CHAOS" displayname="Randomly FAIL memory allocations or other operations">