diff --git a/README.md b/README.md
index 5758882b..d24d4a7f 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@ Wine-Compholio contains fixes for the following Wine bugs:
 * Audio stuttering and performance drops in multiple applications ([Wine Bug #30639](http://bugs.winehq.org/show_bug.cgi?id=30639 "Audio stuttering and performance drops in Star Wolves 3"))
 * Fix comparison of punctuation characters in lstrcmp ([Wine Bug #10767](http://bugs.winehq.org/show_bug.cgi?id=10767 "lstrcmp and others do not compare punctuation characters correctly"))
 * Fix for ConnectNamedPort return value in overlapped mode ([Wine Bug #16550](http://bugs.winehq.org/show_bug.cgi?id=16550 "ConnectNamedPort should never return OK in overlapped mode (affects chromium ui_tests.exe)"))
+* Fix for programs leaking wndproc slots ([Wine Bug #32451](http://bugs.winehq.org/show_bug.cgi?id=32451 "Multiple GOG.com installer bundles show a broken/unresponsive dialog window during installation (installer process running out of wndproc slots)"))
 * GetSecurityInfo returns NULL DACL for process object ([Wine Bug #15980](http://bugs.winehq.org/show_bug.cgi?id=15980 "Rhapsody 2 crashes on startup (GetSecurityInfo returns NULL DACL for process object)"))
 * Implement LoadIconMetric function ([Wine Bug #35375](http://bugs.winehq.org/show_bug.cgi?id=35375 "Multiple applications need Vista+ API COMCTL32.dll.380 a.k.a. 'LoadIconMetric' (Solidworks 2013 systray monitor, Microsoft One/SkyDrive)"))
 * Implement a Microsoft Yahei replacement font ([Wine Bug #13829](http://bugs.winehq.org/show_bug.cgi?id=13829 "Wine does not have CJK fonts"))
diff --git a/debian/changelog b/debian/changelog
index f8912d17..a3e8eef8 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -20,6 +20,7 @@ wine-compholio (1.7.24) UNRELEASED; urgency=low
   * Added patch to fix invalid memory access in windowscodecs/PropertyBag.
   * Added patch to use a linear resampler when there a large number of dsound mixing buffers.
   * Added patch to fix comparison of punctuation characters in lstrcmp.
+  * Added patch to workaround programs leaking wndproc splots.
   * Removed patch to create Vista directories (accepted upstream).
   * Removed strmbase/quartz locking fix patches (accepted upstream).
   * Removed windowscodecs/PropertyBag patch (accepted upstream).
diff --git a/patches/Makefile b/patches/Makefile
index 5e595223..f4ed38ed 100644
--- a/patches/Makefile
+++ b/patches/Makefile
@@ -39,6 +39,7 @@ PATCHLIST :=	Miscellaneous.ok \
 		shlwapi-UrlCombine.ok \
 		user32-GetSystemMetrics.ok \
 		user32-GetTipText.ok \
+		user32-WndProc.ok \
 		wineboot-HKEY_DYN_DATA.ok \
 		winepulse-PulseAudio_Support.ok \
 		winex11-XEMBED.ok \
@@ -712,6 +713,25 @@ user32-GetTipText.ok:
 		echo '+    { "user32-GetTipText", "Erich E. Hoover", "Handle TOOLTIPS_GetTipText edge cases." },'; \
 	) > user32-GetTipText.ok
 
+# Patchset user32-WndProc
+# |
+# | Included patches:
+# |   *	Workaround for programs leaking wndproc splots. [by Sebastian Lackner]
+# |
+# | This patchset fixes the following Wine bugs:
+# |   *	[#32451] Multiple GOG.com installer bundles show a broken/unresponsive dialog window during installation (installer
+# | 	process running out of wndproc slots)
+# |
+# | Modified files: 
+# |   *	dlls/user32/winproc.c
+# |
+.INTERMEDIATE: user32-WndProc.ok
+user32-WndProc.ok:
+	$(PATCH) < user32-WndProc/0001-user32-Increase-MAX_WINPROCS-to-16384.patch
+	@( \
+		echo '+    { "user32-WndProc", "Sebastian Lackner", "Workaround for programs leaking wndproc splots." },'; \
+	) > user32-WndProc.ok
+
 # Patchset wineboot-HKEY_DYN_DATA
 # |
 # | Included patches:
diff --git a/patches/user32-WndProc/0001-user32-Increase-MAX_WINPROCS-to-16384.patch b/patches/user32-WndProc/0001-user32-Increase-MAX_WINPROCS-to-16384.patch
new file mode 100644
index 00000000..fc55db80
--- /dev/null
+++ b/patches/user32-WndProc/0001-user32-Increase-MAX_WINPROCS-to-16384.patch
@@ -0,0 +1,25 @@
+From a857ce50c5f1e48d7c08c034374b742292d18344 Mon Sep 17 00:00:00 2001
+From: Sebastian Lackner <sebastian@fds-team.de>
+Date: Fri, 8 Aug 2014 23:40:58 +0200
+Subject: user32: Increase MAX_WINPROCS to 16384.
+
+---
+ dlls/user32/winproc.c |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/dlls/user32/winproc.c b/dlls/user32/winproc.c
+index 57adfc2..e18dd5e 100644
+--- a/dlls/user32/winproc.c
++++ b/dlls/user32/winproc.c
+@@ -45,7 +45,7 @@ typedef struct tagWINDOWPROC
+     WNDPROC        procW;    /* Unicode window proc */
+ } WINDOWPROC;
+ 
+-#define MAX_WINPROCS  4096
++#define MAX_WINPROCS  16384
+ #define MAX_WINPROC_RECURSION  64
+ #define WINPROC_PROC16  ((WINDOWPROC *)1)  /* placeholder for 16-bit window procs */
+ 
+-- 
+1.7.9.5
+
diff --git a/patches/user32-WndProc/definition b/patches/user32-WndProc/definition
new file mode 100644
index 00000000..600f231a
--- /dev/null
+++ b/patches/user32-WndProc/definition
@@ -0,0 +1,4 @@
+Author: Sebastian Lackner
+Subject: Workaround for programs leaking wndproc splots.
+Revision: 1
+Fixes: [32451] Fix for programs leaking wndproc slots