diff --git a/JavaLibrary.mk b/JavaLibrary.mk
index 64fdb7e..69aa420 100644
--- a/JavaLibrary.mk
+++ b/JavaLibrary.mk
@@ -54,6 +54,11 @@
 LOCAL_SRC_FILES := $(core_src_files)
 LOCAL_JAVA_RESOURCE_DIRS := $(core_resource_dirs)
 
+ifeq ($(EMMA_INSTRUMENT),true)
+LOCAL_SRC_FILES += $(call all-java-files-under, ../../external/emma/core ../../external/emma/pregenerated)
+LOCAL_JAVA_RESOURCE_DIRS += ../../external/emma/core/res ../../external/emma/pregenerated/res
+endif
+
 LOCAL_NO_STANDARD_LIBRARIES := true
 LOCAL_DX_FLAGS := --core-library