diff --git a/dlls/d3d10core/device.c b/dlls/d3d10core/device.c
index 25439b0cf69..fbebf9ed28c 100644
--- a/dlls/d3d10core/device.c
+++ b/dlls/d3d10core/device.c
@@ -271,8 +271,19 @@ static void STDMETHODCALLTYPE d3d10_device_DrawInstanced(ID3D10Device *iface,
 static void STDMETHODCALLTYPE d3d10_device_GSSetConstantBuffers(ID3D10Device *iface,
         UINT start_slot, UINT buffer_count, ID3D10Buffer *const *buffers)
 {
-    FIXME("iface %p, start_slot %u, buffer_count %u, buffers %p stub!\n",
+    struct d3d10_device *device = impl_from_ID3D10Device(iface);
+    unsigned int i;
+
+    TRACE("iface %p, start_slot %u, buffer_count %u, buffers %p.\n",
             iface, start_slot, buffer_count, buffers);
+
+    for (i = 0; i < buffer_count; ++i)
+    {
+        struct d3d10_buffer *buffer = unsafe_impl_from_ID3D10Buffer(buffers[i]);
+
+        wined3d_device_set_gs_cb(device->wined3d_device, start_slot + i,
+                buffer ? buffer->wined3d_buffer : NULL);
+    }
 }
 
 static void STDMETHODCALLTYPE d3d10_device_GSSetShader(ID3D10Device *iface, ID3D10GeometryShader *shader)
diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index 57e1de9b2b4..6ea2f85ea17 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -3129,6 +3129,45 @@ struct wined3d_shader * CDECL wined3d_device_get_geometry_shader(const struct wi
     return device->stateBlock->state.geometry_shader;
 }
 
+void CDECL wined3d_device_set_gs_cb(struct wined3d_device *device, UINT idx, struct wined3d_buffer *buffer)
+{
+    struct wined3d_buffer *prev;
+
+    TRACE("device %p, idx %u, buffer %p.\n", device, idx, buffer);
+
+    if (idx >= MAX_CONSTANT_BUFFERS)
+    {
+        WARN("Invalid constant buffer index %u.\n", idx);
+        return;
+    }
+
+    prev = device->updateStateBlock->state.gs_cb[idx];
+    device->updateStateBlock->state.gs_cb[idx] = buffer;
+
+    if (device->isRecordingState)
+    {
+        if (buffer)
+            wined3d_buffer_incref(buffer);
+        if (prev)
+            wined3d_buffer_decref(prev);
+        return;
+    }
+
+    if (prev != buffer)
+    {
+        if (buffer)
+        {
+            InterlockedIncrement(&buffer->resource.bind_count);
+            wined3d_buffer_incref(buffer);
+        }
+        if (prev)
+        {
+            InterlockedDecrement(&prev->resource.bind_count);
+            wined3d_buffer_decref(prev);
+        }
+    }
+}
+
 /* Context activation is done by the caller. */
 /* Do not call while under the GL lock. */
 #define copy_and_next(dest, src, size) memcpy(dest, src, size); dest += (size)
diff --git a/dlls/wined3d/stateblock.c b/dlls/wined3d/stateblock.c
index 11d8fa88b4b..64998774d29 100644
--- a/dlls/wined3d/stateblock.c
+++ b/dlls/wined3d/stateblock.c
@@ -536,6 +536,15 @@ void stateblock_unbind_resources(struct wined3d_stateblock *stateblock)
         wined3d_shader_decref(shader);
     }
 
+    for (i = 0; i < MAX_CONSTANT_BUFFERS; ++i)
+    {
+        if ((buffer = state->gs_cb[i]))
+        {
+            state->gs_cb[i] = NULL;
+            wined3d_buffer_decref(buffer);
+        }
+    }
+
     if ((shader = state->pixel_shader))
     {
         state->pixel_shader = NULL;
diff --git a/dlls/wined3d/wined3d.spec b/dlls/wined3d/wined3d.spec
index b7b04df0bc6..d08c33f1015 100644
--- a/dlls/wined3d/wined3d.spec
+++ b/dlls/wined3d/wined3d.spec
@@ -116,6 +116,7 @@
 @ cdecl wined3d_device_set_dialog_box_mode(ptr long)
 @ cdecl wined3d_device_set_gamma_ramp(ptr long long ptr)
 @ cdecl wined3d_device_set_geometry_shader(ptr ptr)
+@ cdecl wined3d_device_set_gs_cb(ptr long ptr)
 @ cdecl wined3d_device_set_index_buffer(ptr ptr long)
 @ cdecl wined3d_device_set_light(ptr long ptr)
 @ cdecl wined3d_device_set_light_enable(ptr long long)
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index ddf1fa2e312..4d7d456f774 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -2306,6 +2306,7 @@ struct wined3d_state
     float *vs_consts_f;
 
     struct wined3d_shader *geometry_shader;
+    struct wined3d_buffer *gs_cb[MAX_CONSTANT_BUFFERS];
 
     struct wined3d_shader *pixel_shader;
     BOOL ps_consts_b[MAX_CONST_B];
diff --git a/include/wine/wined3d.h b/include/wine/wined3d.h
index 7b1e043e409..206c8ef982a 100644
--- a/include/wine/wined3d.h
+++ b/include/wine/wined3d.h
@@ -2206,6 +2206,7 @@ HRESULT __cdecl wined3d_device_set_dialog_box_mode(struct wined3d_device *device
 void __cdecl wined3d_device_set_gamma_ramp(const struct wined3d_device *device,
         UINT swapchain_idx, DWORD flags, const struct wined3d_gamma_ramp *ramp);
 void __cdecl wined3d_device_set_geometry_shader(struct wined3d_device *device, struct wined3d_shader *shader);
+void __cdecl wined3d_device_set_gs_cb(struct wined3d_device *device, UINT idx, struct wined3d_buffer *buffer);
 void __cdecl wined3d_device_set_index_buffer(struct wined3d_device *device,
         struct wined3d_buffer *index_buffer, enum wined3d_format_id format_id);
 HRESULT __cdecl wined3d_device_set_light(struct wined3d_device *device,