diff --git a/ci/run.sh b/ci/run.sh
index f1acace..2709617 100755
--- a/ci/run.sh
+++ b/ci/run.sh
@@ -94,9 +94,17 @@ for rlib in $(echo $path); do
     set +x
     stdout=$($PREFIX$NM -g --defined-only $rlib 2>&1)
 
-    # NOTE On i586, It's normal that the get_pc_thunk symbol appears several times so ignore it
+    # NOTE On i586, It's normal that the get_pc_thunk symbol appears several
+    # times so ignore it
+    #
+    # FIXME(#167) - we shouldn't ignore `__builtin_cl` style symbols here.
     set +e
-    echo "$stdout" | sort | uniq -d | grep -v __x86.get_pc_thunk | grep 'T __'
+    echo "$stdout" | \
+      sort | \
+      uniq -d | \
+      grep -v __x86.get_pc_thunk | \
+      grep -v __builtin_cl | \
+      grep 'T __'
 
     if test $? = 0; then
         exit 1