diff --git a/infer/src/Makefile b/infer/src/Makefile
index 8ad34f4f1..c3f292eb9 100644
--- a/infer/src/Makefile
+++ b/infer/src/Makefile
@@ -18,7 +18,7 @@ ATDGEN_SUFFIXES = _t.ml _t.mli _j.ml _j.mli
 
 #### ocamlbuild options ####
 
-OCAML_FATAL_WARNINGS = +5+6+8+10+11+12+18+19+20+23+26+29+27+32+33+34+35+37+38+39+50
+OCAML_FATAL_WARNINGS = +3+5+6+8+10+11+12+18+19+20+23+26+29+27+33+34+35+37+38+39+50
 
 # options for ocamlbuild
 # Notice that use-ocamlfind is used here to avoid a linker bug in ocamlbuild when using -tag thread