diff --git a/srcpkgs/erlang/patches/ERL-490.patch b/srcpkgs/erlang/patches/ERL-490.patch
index dbcc98f0c8c..70d6eb7a22c 100644
--- a/srcpkgs/erlang/patches/ERL-490.patch
+++ b/srcpkgs/erlang/patches/ERL-490.patch
@@ -18,8 +18,8 @@ https://bugs.erlang.org/browse/ERL-490
  lib/compiler/test/bs_match_SUITE.erl | 38 ++++++++++++++++++++++++++++++++++--
  2 files changed, 39 insertions(+), 5 deletions(-)
 
---- lib/compiler/src/beam_validator.erl
-+++ lib/compiler/src/beam_validator.erl
+--- otp_src_20.1/lib/compiler/src/beam_validator.erl
++++ otp_src_20.1/lib/compiler/src/beam_validator.erl
 @@ -1430,13 +1430,13 @@ merge_types(bool, {atom,A}) ->
      merge_bool(A);
  merge_types({atom,A}, bool) ->
@@ -37,9 +37,8 @@ https://bugs.erlang.org/browse/ERL-490
  merge_types(T1, T2) when T1 =/= T2 ->
      %% Too different. All we know is that the type is a 'term'.
      term.
-diff --git a/lib/compiler/test/bs_match_SUITE.erl b/lib/compiler/test/bs_match_SUITE.erl
---- lib/compiler/test/bs_match_SUITE.erl
-+++ lib/compiler/test/bs_match_SUITE.erl
+--- otp_src_20.1/lib/compiler/test/bs_match_SUITE.erl
++++ otp_src_20.1/lib/compiler/test/bs_match_SUITE.erl
 @@ -39,7 +39,7 @@
  	 match_string_opt/1,select_on_integer/1,
  	 map_and_binary/1,unsafe_branch_caching/1,