diff --git a/configure b/configure
index a631dc912b0..36576c21244 100755
--- a/configure
+++ b/configure
@@ -2125,6 +2125,9 @@ if [ "$OPT_SHADOW" = "yes" ]; then
     # save a pre-existing mkspecs/modules dir
     test -d "$outpath/mkspecs/modules" && \
         mv "$outpath/mkspecs/modules" "$outpath/mkspecs-modules"
+    # ditto for mkspecs/modules-inst
+    test -d "$outpath/mkspecs/modules-inst" && \
+        mv "$outpath/mkspecs/modules-inst" "$outpath/mkspecs-modules-inst"
 
     # symlink the mkspecs directory
     mkdir -p "$outpath/mkspecs"
@@ -2152,6 +2155,12 @@ if [ "$OPT_SHADOW" = "yes" ]; then
         ShadowMkspecs modules
     fi
 
+    # The modules-inst dir is not quite as special, but still.
+    if test -d "$outpath/mkspecs-modules-inst"; then
+        rm -rf "$outpath/mkspecs/modules-inst"
+        mv "$outpath/mkspecs-modules-inst" "$outpath/mkspecs/modules-inst"
+    fi
+
     # symlink the doc directory
     rm -rf "$outpath/doc"
     ln -s "$relpath/doc" "$outpath/doc"