diff --git a/core/droiddoc.mk b/core/droiddoc.mk
index 383cafd06..620001b91 100644
--- a/core/droiddoc.mk
+++ b/core/droiddoc.mk
@@ -149,6 +149,11 @@ else
 $(full_target): PRIVATE_DROIDDOC_HTML_DIR :=
 html_dir_files :=
 endif
+ifneq ($(strip $(LOCAL_ADDITIONAL_HTML_DIR)),)
+$(full_target): PRIVATE_ADDITIONAL_HTML_DIR := -htmldir2 $(LOCAL_PATH)/$(LOCAL_ADDITIONAL_HTML_DIR)
+else
+$(full_target): PRIVATE_ADDITIONAL_HTML_DIR :=
+endif
 
 # TODO: not clear if this is used any more
 $(full_target): PRIVATE_LOCAL_PATH := $(LOCAL_PATH)
@@ -168,6 +173,7 @@ $(full_target): $(full_src_files) $(droiddoc_templates) $(droiddoc) $(html_dir_f
                 -docletpath $(PRIVATE_DOCLETPATH) \
                 -templatedir $(PRIVATE_CUSTOM_TEMPLATE_DIR) \
                 $(PRIVATE_DROIDDOC_HTML_DIR) \
+                $(PRIVATE_ADDITIONAL_HTML_DIR) \
                 $(addprefix -bootclasspath ,$(PRIVATE_BOOTCLASSPATH)) \
                 $(addprefix -classpath ,$(PRIVATE_CLASSPATH)) \
                 -sourcepath $(PRIVATE_SOURCE_PATH)$(addprefix :,$(PRIVATE_CLASSPATH)) \