diff --git a/srcpkgs/mono/patches/musl.patch b/srcpkgs/mono/patches/musl.patch
new file mode 100644
index 0000000000..8eede34fef
--- /dev/null
+++ b/srcpkgs/mono/patches/musl.patch
@@ -0,0 +1,12 @@
+--- mono/utils/mono-state.c	2019-01-18 10:59:39.355034555 +0100
++++ mono/utils/mono-state.c	2019-01-18 11:00:48.212036254 +0100
+@@ -33,7 +33,9 @@
+ #endif
+ 
+ #include <sys/param.h>
++#if defined(__GLIBC__)
+ #include <sys/sysctl.h>
++#endif
+ #include <fcntl.h>
+ 
+ typedef struct {
diff --git a/srcpkgs/mono/template b/srcpkgs/mono/template
index 385e7108d5..3fa55b9747 100644
--- a/srcpkgs/mono/template
+++ b/srcpkgs/mono/template
@@ -1,6 +1,6 @@
 # Template file for 'mono'
 pkgname=mono
-version=5.18.0.225
+version=5.18.0.240
 revision=1
 build_style=gnu-configure
 configure_args="--disable-system-aot"
@@ -13,7 +13,7 @@ maintainer="Helmut Pozimski <helmut@pozimski.eu>"
 license="MIT, BSD-3-Clause, GPL-2.0-or-later, LGPL-2.0-or-later, MPL-1.1"
 homepage="https://www.mono-project.com"
 distfiles="https://download.mono-project.com/sources/mono/${pkgname}-${version}.tar.bz2"
-checksum=91aa3e8a12aaf94760a092866abc5c5f1f437ecd0a97bedfff857c439aa7a87f
+checksum=143e80eb00519ff496742e78ee07403a3c3629437f3a498eee539de8108da895
 lib32disabled=yes
 
 case "$XBPS_TARGET_MACHINE" in