diff --git a/lib/erl/build/otp.mk b/lib/erl/build/otp.mk
index 0e0381e..1d16e2c 100644
--- a/lib/erl/build/otp.mk
+++ b/lib/erl/build/otp.mk
@@ -25,6 +25,7 @@
 
 # MHOST is the host where this Makefile runs.
 MHOST=${shell hostname -s}
+ERL_COMPILE_FLAGS+=-W0
 
 # The location of the erlang runtime system.
 ifndef ERL_RUN_TOP