--- a/m4/lib-prefix.m4
+++ b/m4/lib-prefix.m4
@@ -108,7 +108,8 @@
         if test -z "$haveit"; then
           if test -d "$additional_libdir"; then
             dnl Really add $additional_libdir to $LDFLAGS.
-            LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
+            dnl No, let's not do that.
+            :
           fi
         fi
       fi