1 files changed, 1 insertions, 1 deletions
diff --git a/configure b/configure
index 70d5cb565e..d736fb7705 100755
--- a/configure
+++ b/configure
@@ -4533,7 +4533,7 @@ fi
 # tweak OPT based on compiler and platform, only if the user didn't set
 # it on the command line
 
-if test -z "$OPT"
+if test "${OPT-unset}" == "unset"
 then
     case $GCC in
     yes)