diff --git a/Makefile.am b/Makefile.am
index 855b38a4..30f4784b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -105,7 +105,7 @@ distdir-regression: $(DISTFILES_REGRESSION)
 	    || exit 1; \
 	  fi; \
 	done
-	-find $(distdir) -type d ! -perm -777 -exec chmod a+rwx {} \; -o \
+	-find $(distdir) -type d ! -perm -755 -exec chmod a+rwx {} \; -o \
 	  ! -type d ! -perm -444 -links 1 -exec chmod a+r {} \; -o \
 	  ! -type d ! -perm -400 -exec chmod a+r {} \; -o \
 	  ! -type d ! -perm -444 -exec $(SHELL) $(install_sh) -c -m a+r {} {} \; \