diff --git a/common.mk b/common.mk
index ae35b43..7cef2f2 100644
--- a/common.mk
+++ b/common.mk
@@ -24,7 +24,7 @@
 
 #Common C flags
 common_flags := -Wno-missing-field-initializers
-common_flags += -Wconversion -Wall -Werror
+common_flags += -Wconversion -Wall -Werror -Wno-sign-conversion
 common_flags += -DUSE_GRALLOC1
 ifeq ($(TARGET_IS_HEADLESS), true)
     common_flags += -DTARGET_HEADLESS