diff --git a/share/mk/bsd.sys.mk b/share/mk/bsd.sys.mk
index a9a7ccecd2e0..e94977c43cfb 100644
--- a/share/mk/bsd.sys.mk
+++ b/share/mk/bsd.sys.mk
@@ -81,9 +81,6 @@ CWARNFLAGS.clang+=	-Wno-unused-local-typedef
 .endif # WARNS <= 3
 .if ${WARNS} <= 2
 CWARNFLAGS.clang+=	-Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
-.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30900
-CWARNFLAGS.clang+=	-Wno-constant-conversion
-.endif
 .endif # WARNS <= 2
 .if ${WARNS} <= 1
 CWARNFLAGS.clang+=	-Wno-parentheses