diff --git a/srcpkgs/qt5/patches/0035-gcc-9.1-build.patch b/srcpkgs/qt5/patches/0035-gcc-9.1-build.patch
new file mode 100644
index 00000000000..04da3d4c708
--- /dev/null
+++ b/srcpkgs/qt5/patches/0035-gcc-9.1-build.patch
@@ -0,0 +1,35 @@
+From 0d89dead4396126606fb7954c0bb0a2734d2347b Mon Sep 17 00:00:00 2001
+From: Allan Sandfeld Jensen <allan.jensen@qt.io>
+Date: Tue, 13 Nov 2018 16:00:23 +0100
+Subject: [PATCH] Fix compile issue with gcc 9
+
+It appears messenne_twisters in the latest libstdc++ has one more
+requirement before it is willing to construct with our
+SystemGenerator struct as an sseq provider.
+
+Upstream-Status: Backport
+
+Change-Id: If38151d1fa6f40a80274acc26d9ed6b4ac6049fe
+Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
+Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
+---
+
+ qtbase/src/corelib/global/qrandom.cpp | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/corelib/global/qrandom.cpp b/src/corelib/global/qrandom.cpp
+index ebf9864b15..577736a867 100644
+--- qtbase/src/corelib/global/qrandom.cpp
++++ qtbase/src/corelib/global/qrandom.cpp
+@@ -218,6 +218,7 @@ struct QRandomGenerator::SystemGenerator
+ #endif // Q_OS_WINRT
+ 
+     static SystemGenerator &self();
++    typedef quint32 result_type;
+     void generate(quint32 *begin, quint32 *end) Q_DECL_NOEXCEPT_EXPR(FillBufferNoexcept);
+ 
+     // For std::mersenne_twister_engine implementations that use something
+-- 
+2.20.1
+
+