diff --git a/extra/opendoas/build b/extra/opendoas/build
index fe9db30f..b633f7ae 100755
--- a/extra/opendoas/build
+++ b/extra/opendoas/build
@@ -1,7 +1,5 @@
 #!/bin/sh -e
 
-patch -p1 < bison-3.8.patch
-
 BINOWN="$(id -u)" \
 BINGRP="$(id -g)" \
 ./configure \
diff --git a/extra/opendoas/checksums b/extra/opendoas/checksums
index 1d69f8f1..5f1bffeb 100644
--- a/extra/opendoas/checksums
+++ b/extra/opendoas/checksums
@@ -1,3 +1,2 @@
 c9070ae745d0f1bbe68ef0783a3958cd011b409959f65fd100e6b42b8ad6b162
 846a251c646e61329086eda6abde26329f5a358d5eeab1a0f075db36e5997687
-28e74db164d001820ed295573f14610b76282ed15fee5fb819058949419ea860
diff --git a/extra/opendoas/patches/bison-3.8.patch b/extra/opendoas/patches/bison-3.8.patch
deleted file mode 100644
index 1c66944b..00000000
--- a/extra/opendoas/patches/bison-3.8.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/parse.y b/parse.y
-index 388c2a5..65fda3d 100644
---- a/parse.y
-+++ b/parse.y
-@@ -57,6 +57,8 @@ static size_t maxrules;
- 
- int parse_errors = 0;
- 
-+#define yyerror yyerror
-+#define yylex yylex
- static void yyerror(const char *, ...);
- static int yylex(void);
- 
diff --git a/extra/opendoas/sources b/extra/opendoas/sources
index 7c4bc226..394ad008 100644
--- a/extra/opendoas/sources
+++ b/extra/opendoas/sources
@@ -1,3 +1,2 @@
 https://github.com/Duncaen/OpenDoas/archive/vVERSION.tar.gz
 files/doas.conf
-patches/bison-3.8.patch