diff --git a/srcpkgs/texi2mdoc/patches/musl.patch b/srcpkgs/texi2mdoc/patches/musl.patch
new file mode 100644
index 00000000000..ef680595b96
--- /dev/null
+++ b/srcpkgs/texi2mdoc/patches/musl.patch
@@ -0,0 +1,13 @@
+Needed for __BEGIN_DECLS/__END_DECLS.
+
+--- extern.h
++++ extern.h
+@@ -17,6 +17,8 @@
+ #ifndef EXTERN_H
+ #define EXTERN_H
+ 
++#include <sys/cdefs.h>
++
+ /*
+  * This defines each one of the Texinfo commands that we understand.
+  * Obviously this only refers to native commands; overriden names are a