diff --git a/dlls/wined3d/shader.c b/dlls/wined3d/shader.c
index 24051cc833a..e5b969c5727 100644
--- a/dlls/wined3d/shader.c
+++ b/dlls/wined3d/shader.c
@@ -1931,6 +1931,10 @@ static void shader_dump_register(struct wined3d_string_buffer *buffer,
             shader_addline(buffer, "fp");
             break;
 
+        case WINED3DSPR_COVERAGE:
+            shader_addline(buffer, "vCoverage");
+            break;
+
         default:
             shader_addline(buffer, "<unhandled_rtype(%#x)>", reg->type);
             break;
diff --git a/dlls/wined3d/shader_sm4.c b/dlls/wined3d/shader_sm4.c
index 4a4926b7798..4ed2391e8b1 100644
--- a/dlls/wined3d/shader_sm4.c
+++ b/dlls/wined3d/shader_sm4.c
@@ -306,6 +306,7 @@ enum wined3d_sm4_register_type
     WINED3D_SM5_RT_THREAD_ID               = 0x20,
     WINED3D_SM5_RT_THREAD_GROUP_ID         = 0x21,
     WINED3D_SM5_RT_LOCAL_THREAD_ID         = 0x22,
+    WINED3D_SM5_RT_COVERAGE                = 0x23,
     WINED3D_SM5_RT_LOCAL_THREAD_INDEX      = 0x24,
 };
 
@@ -1020,7 +1021,7 @@ static const enum wined3d_shader_register_type register_type_table[] =
     /* WINED3D_SM5_RT_THREAD_ID */               WINED3DSPR_THREADID,
     /* WINED3D_SM5_RT_THREAD_GROUP_ID */         WINED3DSPR_THREADGROUPID,
     /* WINED3D_SM5_RT_LOCAL_THREAD_ID */         WINED3DSPR_LOCALTHREADID,
-    /* UNKNOWN */                                ~0u,
+    /* WINED3D_SM5_RT_COVERAGE */                WINED3DSPR_COVERAGE,
     /* WINED3D_SM5_RT_LOCAL_THREAD_INDEX */      WINED3DSPR_LOCALTHREADINDEX,
 };
 
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index e788f59d4d7..0be5856c9cf 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -394,6 +394,7 @@ enum wined3d_shader_register_type
     WINED3DSPR_STREAM,
     WINED3DSPR_FUNCTIONBODY,
     WINED3DSPR_FUNCTIONPOINTER,
+    WINED3DSPR_COVERAGE,
 };
 
 enum wined3d_data_type