diff --git a/srcpkgs/qmltermwidget/patches/iswspace.patch b/srcpkgs/qmltermwidget/patches/iswspace.patch
new file mode 100644
index 00000000000..89695c53b52
--- /dev/null
+++ b/srcpkgs/qmltermwidget/patches/iswspace.patch
@@ -0,0 +1,13 @@
+Index: lib/TerminalCharacterDecoder.cpp
+===================================================================
+--- lib/TerminalCharacterDecoder.cpp.orig
++++ lib/TerminalCharacterDecoder.cpp
+@@ -22,6 +22,8 @@
+ // Own
+ #include "TerminalCharacterDecoder.h"
+ 
++#include <cwctype>
++
+ // Qt
+ #include <QTextStream>
+