diff --git a/mozilla/config/Makefile.in b/mozilla/config/Makefile.in
index 32e00d0354e..5aad10661ac 100644
--- a/mozilla/config/Makefile.in
+++ b/mozilla/config/Makefile.in
@@ -60,6 +60,12 @@ ifdef GNU_CC
 MODULE_OPTIMIZE_FLAGS = -O3
 endif
 
+ifndef MOZ_AUTO_DEPS
+ifndef MOZ_NATIVE_MAKEDEPEND
+DIRS		+= mkdepend
+endif
+endif
+
 include $(topsrcdir)/config/config.mk
 include $(topsrcdir)/config/rules.mk