diff --git a/hw/xbox/nv2a/pgraph/vk/draw.c b/hw/xbox/nv2a/pgraph/vk/draw.c
index 121bea5d74..4cde028b1f 100644
--- a/hw/xbox/nv2a/pgraph/vk/draw.c
+++ b/hw/xbox/nv2a/pgraph/vk/draw.c
@@ -1698,10 +1698,10 @@ void pgraph_vk_clear_surface(NV2AState *d, uint32_t parameter)
     uint32_t clearrectx = pgraph_reg_r(pg, NV_PGRAPH_CLEARRECTX);
     uint32_t clearrecty = pgraph_reg_r(pg, NV_PGRAPH_CLEARRECTY);
 
-    int xmin = GET_MASK(clearrectx, NV_PGRAPH_CLEARRECTX_XMIN);
-    int xmax = GET_MASK(clearrectx, NV_PGRAPH_CLEARRECTX_XMAX);
-    int ymin = GET_MASK(clearrecty, NV_PGRAPH_CLEARRECTY_YMIN);
-    int ymax = GET_MASK(clearrecty, NV_PGRAPH_CLEARRECTY_YMAX);
+    unsigned int xmin = GET_MASK(clearrectx, NV_PGRAPH_CLEARRECTX_XMIN);
+    unsigned int xmax = GET_MASK(clearrectx, NV_PGRAPH_CLEARRECTX_XMAX);
+    unsigned int ymin = GET_MASK(clearrecty, NV_PGRAPH_CLEARRECTY_YMIN);
+    unsigned int ymax = GET_MASK(clearrecty, NV_PGRAPH_CLEARRECTY_YMAX);
 
     NV2A_VK_DGROUP_BEGIN("CLEAR min=(%d,%d) max=(%d,%d)%s%s", xmin, ymin, xmax,
                          ymax, write_color ? " color" : "",
@@ -1713,14 +1713,15 @@ void pgraph_vk_clear_surface(NV2AState *d, uint32_t parameter)
         binding->vram_addr);
     begin_draw(pg);
 
-    // FIXME: What does hardware do when min <= max?
+    // FIXME: What does hardware do when min >= max?
+    // FIXME: What does hardware do when min >= surface size?
     xmin = MIN(xmin, binding->width - 1);
     ymin = MIN(ymin, binding->height - 1);
-    xmax = MIN(xmax, binding->width - 1);
-    ymax = MIN(ymax, binding->height - 1);
+    xmax = MAX(xmin, MIN(xmax, binding->width - 1));
+    ymax = MAX(ymin, MIN(ymax, binding->height - 1));
 
-    int scissor_width = MAX(0, xmax - xmin + 1),
-        scissor_height = MAX(0, ymax - ymin + 1);
+    unsigned int scissor_width = MAX(0, xmax - xmin + 1);
+    unsigned int scissor_height = MAX(0, ymax - ymin + 1);
 
     pgraph_apply_anti_aliasing_factor(pg, &xmin, &ymin);
     pgraph_apply_anti_aliasing_factor(pg, &scissor_width, &scissor_height);