diff --git a/extra/opendoas/build b/extra/opendoas/build
index b633f7ae..fe9db30f 100755
--- a/extra/opendoas/build
+++ b/extra/opendoas/build
@@ -1,5 +1,7 @@
 #!/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 5f1bffeb..1d69f8f1 100644
--- a/extra/opendoas/checksums
+++ b/extra/opendoas/checksums
@@ -1,2 +1,3 @@
 c9070ae745d0f1bbe68ef0783a3958cd011b409959f65fd100e6b42b8ad6b162
 846a251c646e61329086eda6abde26329f5a358d5eeab1a0f075db36e5997687
+28e74db164d001820ed295573f14610b76282ed15fee5fb819058949419ea860
diff --git a/extra/opendoas/patches/bison-3.8.patch b/extra/opendoas/patches/bison-3.8.patch
new file mode 100644
index 00000000..1c66944b
--- /dev/null
+++ b/extra/opendoas/patches/bison-3.8.patch
@@ -0,0 +1,13 @@
+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 394ad008..7c4bc226 100644
--- a/extra/opendoas/sources
+++ b/extra/opendoas/sources
@@ -1,2 +1,3 @@
 https://github.com/Duncaen/OpenDoas/archive/vVERSION.tar.gz
 files/doas.conf
+patches/bison-3.8.patch
diff --git a/extra/opendoas/version b/extra/opendoas/version
index b0a3ed87..2c26db69 100644
--- a/extra/opendoas/version
+++ b/extra/opendoas/version
@@ -1 +1 @@
-6.8.1 1
+6.8.1 2