diff --git a/srcpkgs/openmsx/patches/fix-build.patch b/srcpkgs/openmsx/patches/fix-build.patch
new file mode 100644
index 00000000000..fd697427446
--- /dev/null
+++ b/srcpkgs/openmsx/patches/fix-build.patch
@@ -0,0 +1,10 @@
+--- a/src/file/FileBase.hh
++++ b/src/file/FileBase.hh
+@@ -5,6 +5,7 @@
+ #include "span.hh"
+ #include <cstdint>
+ #include <string>
++#include <ctime>
+ 
+ namespace openmsx {
+