diff --git a/dx/src/Android.mk b/dx/src/Android.mk
index c295f81..8c9e76b 100644
--- a/dx/src/Android.mk
+++ b/dx/src/Android.mk
@@ -15,6 +15,7 @@
 LOCAL_JAR_MANIFEST := ../etc/manifest.txt
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE:= dx
+LOCAL_JAVA_LANGUAGE_VERSION := 1.7
 
 include $(BUILD_HOST_JAVA_LIBRARY)