diff --git a/core/main.mk b/core/main.mk
index 37c580d..b33a7aa 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -209,6 +209,14 @@
     $(warning implicitly installing apns-conf_sdk.xml)
   endif
 endif
+# Install a vold.conf file is one's not already being installed.
+ifeq (,$(filter %:system/etc/vold.conf, $(PRODUCT_COPY_FILES)))
+  PRODUCT_COPY_FILES += \
+	development/data/etc/vold.conf:system/etc/vold.conf
+  ifeq ($(filter eng tests,$(TARGET_BUILD_VARIANT)),)
+    $(warning implicitly installing vold.conf)
+  endif
+endif
 # If we're on an eng or tests build, but not on the sdk, and we have
 # a better one, use that instead.
 ifneq ($(filter eng tests,$(TARGET_BUILD_VARIANT)),)