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-rw-r--r--lib/pp_control.ml3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/pp_control.ml b/lib/pp_control.ml
index 0b886342d8..e439161251 100644
--- a/lib/pp_control.ml
+++ b/lib/pp_control.ml
@@ -89,7 +89,8 @@ let with_output_to ch =
let std_ft = ref Format.std_formatter
let _ = set_dflt_gp !std_ft
-let err_ft = with_output_to stderr
+let err_ft = ref Format.err_formatter
+let _ = set_gp !err_ft deep_gp
let deep_ft = with_output_to stdout
let _ = set_gp deep_ft deep_gp