diff --git a/src/auto/configure b/src/auto/configure
index be3c8a14b7..3aaea3d245 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -4301,7 +4301,7 @@ rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
   else
     if test -z "$MACOSX_DEPLOYMENT_TARGET"; then
-      macosx_deployment_target=`/usr/bin/sw_vers -productVersion`
+      macosx_deployment_target=`/usr/bin/sw_vers -productVersion|/usr/bin/sed -e 's/^\(0-9*\.0-9*\).*/\1/'`
       XCODEFLAGS="$XCODEFLAGS MACOSX_DEPLOYMENT_TARGET=$macosx_deployment_target"
     fi
   fi
diff --git a/src/configure.in b/src/configure.in
index 795f9f1c30..0f8b982a66 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -189,7 +189,7 @@ if test "`(uname) 2>/dev/null`" = Darwin; then
         LDFLAGS="$save_ldflags" ])
   else
     if test -z "$MACOSX_DEPLOYMENT_TARGET"; then
-      macosx_deployment_target=`/usr/bin/sw_vers -productVersion`
+      macosx_deployment_target=`/usr/bin/sw_vers -productVersion|/usr/bin/sed -e 's/^\([0-9]*\.[0-9]*\).*/\1/'`
       XCODEFLAGS="$XCODEFLAGS MACOSX_DEPLOYMENT_TARGET=$macosx_deployment_target"
     fi
   fi