diff --git a/configure.ac b/configure.ac
index 3ee332521f6..d054104dd17 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1026,7 +1026,7 @@ Please verify that the path to the SDK build tools you specified is correct])
   fi
 
   AC_PATH_PROGS([D8], [d8], [], "${SDK_BUILD_TOOLS}:$PATH")
-  if test "D8" = ""; then
+  if test "$D8" = ""; then
     AC_MSG_ERROR([The Android dexer was not found.
 Please verify that the path to the SDK build tools you specified is correct])
   fi