diff --git a/testcurl.sh b/testcurl.sh
index 967c0e1fa9f94cb4809489df2b6c5cfb7ee55fc4..0f872b27f02cfa1e02a7fdaf7937b16e32c6ad4d 100755
--- a/testcurl.sh
+++ b/testcurl.sh
@@ -206,7 +206,7 @@ fi
 echo "testcurl: display lib/config.h"
 grep "^ *#" lib/config.h
 
-if { grep USE_ARES lib/config.h; } then
+if { grep "define USE_ARES" lib/config.h; } then
   echo "testcurl: setup to build ares"
 
   echo "testcurl: build ares"