diff --git a/contrib/teamcity/build-configurations.sh b/contrib/teamcity/build-configurations.sh
--- a/contrib/teamcity/build-configurations.sh
+++ b/contrib/teamcity/build-configurations.sh
@@ -14,7 +14,7 @@
 
 case "$ABC_BUILD_NAME" in
   build-asan)
-    export CONFIGURE_FLAGS="--enable-debug --with-sanitizers=address --disable-ccache"
+    export CONFIGURE_FLAGS="--enable-debug --with-sanitizers=address,undefined --disable-ccache CC=clang CXX=clang++"
     ./build.sh
     ;;