diff --git a/bin/ac b/bin/ac
index 05fd605..30e9534 100755
--- a/bin/ac
+++ b/bin/ac
@@ -6,7 +6,7 @@
 CLEAN=${CLEAN-clean}
 SAMPLES=100
 
-if [ $BRANCH == $CLEAN ]; then
+if [ "$BRANCH" = "$CLEAN" ]; then
     echo "Comparing $BRANCH to itself."
     exit 1
 fi
@@ -23,4 +23,4 @@
 platform_tools/android/bin/android_ninja -t Release nanobench
 platform_tools/android/bin/android_run_skia -t Release nanobench $@ --skps /data/local/tmp/skps -i /data/local/tmp/resources --samples $SAMPLES -v > $BRANCH.log
 
-compare $CLEAN.log $BRANCH.log
+./bin/compare $CLEAN.log $BRANCH.log