diff --git a/Android.mk b/Android.mk
index 2e03c2b..7c6cfd9 100644
--- a/Android.mk
+++ b/Android.mk
@@ -28,5 +28,6 @@
 LOCAL_SRC_FILES := $(call all-java-files-under, guava/src)
 LOCAL_MODULE := guavalib
 LOCAL_STATIC_JAVA_LIBRARIES := jsr305lib
+LOCAL_JAVA_LANGUAGE_VERSION := 1.7
 
 include $(BUILD_HOST_JAVA_LIBRARY)