diff --git a/CMakeLists.txt b/CMakeLists.txt
index 657f7c7..8505abe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -264,6 +264,9 @@ elseif (WITH_GUI)
 		DESTINATION share/icons/hicolor)
 
 	install (SCRIPT cmake/Win32Cleanup.cmake)
+	install (CODE "execute_process (COMMAND
+		sh \"${PROJECT_SOURCE_DIR}/cmake/Win32CleanupAdwaita.sh\"
+		WORKING_DIRECTORY \${CMAKE_INSTALL_PREFIX})")
 endif ()
 
 # Do some unit tests
diff --git a/cmake/Win32CleanupAdwaita.sh b/cmake/Win32CleanupAdwaita.sh
new file mode 100644
index 0000000..194f959
--- /dev/null
+++ b/cmake/Win32CleanupAdwaita.sh
@@ -0,0 +1,19 @@
+#!/bin/sh -e
+# Removes unused icons from the Adwaita theme, it could be even more aggressive,
+# since it keeps around lots of sizes and all the GTK+ stock icons
+export LC_ALL=C
+find share/icons/Adwaita -type f | awk 'BEGIN {
+	while (("grep -aho \"[a-z][a-z-]*\" *.dll *.exe" | getline) > 0)
+		good[$0] = 1
+} /[.](png|svg|cur|ani)$/ {
+	# Cut out the basename without extensions
+	match($0, /[^\/]+$/)
+	base = substr($0, RSTART)
+	sub(/[.].+$/, "", base)
+
+	# Try matching while cutting off suffixes
+	while (!(keep = good[base]) &&
+		sub(/-(ltr|rtl|symbolic)$/, "", base)) {}
+	if (!keep)
+		print
+}' | xargs rm