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-rw-r--r--lib/gs/src/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/gs/src/Makefile b/lib/gs/src/Makefile
index 0a63d5466e..f0200caf01 100644
--- a/lib/gs/src/Makefile
+++ b/lib/gs/src/Makefile
@@ -72,7 +72,7 @@ IMAGES=../priv/bitmap/fup.bm
# ----------------------------------------------------
# FLAGS
# ----------------------------------------------------
-ERL_COMPILE_FLAGS += +warn_obsolete_guard
+ERL_COMPILE_FLAGS += +warn_obsolete_guard -Werror
# ----------------------------------------------------
# Targets