diff --git a/configure b/configure
old mode 100755
new mode 100644
index 96867a550e..634edd54d3
--- a/configure
+++ b/configure
@@ -2473,6 +2473,7 @@ case $target_os in
         ;;
     os/2*)
         ln_s="cp -f"
+        objformat="aout"
         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
         FFSERVERLDFLAGS=""