diff --git a/core/definitions.mk b/core/definitions.mk
index 8fb0215acd..065df784a8 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1426,7 +1426,7 @@ $(hide) if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
 fi
 $(hide) tr ' ' '\n' < $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list \
     | sort -u > $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq
-$(hide) $(1) -encoding ascii \
+$(hide) $(1) -encoding UTF-8 \
     $(strip $(PRIVATE_JAVAC_DEBUG_FLAGS)) \
     $(if $(findstring true,$(LOCAL_WARNINGS_ENABLE)),$(xlint_unchecked),) \
     $(2) \
@@ -1468,7 +1468,7 @@ $(hide) tr ' ' '\n' < $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list \
 @echo "(Incremental) build source files:"
 @cat $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq
 $(hide) if [ -s $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq ] ; then \
-    $(1) -encoding ascii \
+    $(1) -encoding UTF-8 \
     $(strip $(PRIVATE_JAVAC_DEBUG_FLAGS)) \
     $(if $(findstring true,$(LOCAL_WARNINGS_ENABLE)),$(xlint_unchecked),) \
     $(2) \