diff --git a/support/ada.m4 b/support/ada.m4
index a55a5d627d720d6cf28a399f5bc1076c383a3518..1fd1dc7049e7b2d1d2cebd7f2c92bc7fbda1b018 100644
--- a/support/ada.m4
+++ b/support/ada.m4
@@ -30,8 +30,8 @@ EOF
 cat > conftest/gnat.adc <<EOF
 [$4]
 EOF
+cd conftest && $GNATCHOP -q src.ada && $1 $2
 ac_try="cd conftest && $GNATCHOP -q src.ada && $1 $2 > /dev/null 2>../conftest.out"
-cat ../conftest.out
 if AC_TRY_EVAL(ac_try); then
   ifelse([$5], , :, [rm -rf conftest*
   $5])