diff --git a/Manual.md b/Manual.md
index 99e76e4da82..922cbd30f45 100644
--- a/Manual.md
+++ b/Manual.md
@@ -1013,6 +1013,8 @@ This aims to fix cross-builds for when the build-style is mixed: e.g. when in a
 `gnu-configure` style the configure script calls `qmake` or a `Makefile` in
 `gnu-makefile` style, respectively.
 
+- `cmake-wxWidgets-gtk3` sets the `WX_CONFIG` variable which is used by FindwxWidgets.cmake
+
 <a id="functions"></a>
 ### Functions
 
diff --git a/common/build-helper/cmake-wxWidgets-gtk3.sh b/common/build-helper/cmake-wxWidgets-gtk3.sh
new file mode 100644
index 00000000000..9e59751fd7a
--- /dev/null
+++ b/common/build-helper/cmake-wxWidgets-gtk3.sh
@@ -0,0 +1,5 @@
+if [ "$CROSS_BUILD" ]; then
+	export WX_CONFIG=${XBPS_WRAPPERDIR}/wx-config-gtk3
+else
+	export WX_CONFIG=wx-config-gtk3
+fi