diff --git a/patches/patchinstall.sh b/patches/patchinstall.sh
index 4d71bf3f..d2aa0fa3 100755
--- a/patches/patchinstall.sh
+++ b/patches/patchinstall.sh
@@ -354,7 +354,6 @@ patch_enable_all ()
 	enable_wined3d_CSMT_Main="$1"
 	enable_wined3d_DXTn="$1"
 	enable_wined3d_Dual_Source_Blending="$1"
-	enable_wined3d_Improved_RCP_Support="$1"
 	enable_wined3d_Indexed_Vertex_Blending="$1"
 	enable_wined3d_QUERY_Stubs="$1"
 	enable_wined3d_Restore_DirectX10_Support="$1"
@@ -1228,9 +1227,6 @@ patch_enable ()
 		wined3d-Dual_Source_Blending)
 			enable_wined3d_Dual_Source_Blending="$2"
 			;;
-		wined3d-Improved-RCP_Support)
-			enable_wined3d_Improved_RCP_Support="$2"
-			;;
 		wined3d-Indexed_Vertex_Blending)
 			enable_wined3d_Indexed_Vertex_Blending="$2"
 			;;
@@ -7346,22 +7342,6 @@ if test "$enable_wined3d_CSMT_Main" -eq 1; then
 	) >> "$patchlist"
 fi
 
-# Patchset wined3d-Improved-RCP_Support
-# |
-# | This patchset fixes the following Wine bugs:
-# |   *	[#36089] Improve dirt rendering in SpinTires
-# |   *	[#45375] Halo online black display problems
-# |
-# | Modified files:
-# |   *	dlls/wined3d/glsl_shader.c
-# |
-if test "$enable_wined3d_Improved_RCP_Support" -eq 1; then
-	patch_apply wined3d-Improved-RCP_Support/0001-wined3d-Improve-dirt-rendering-in-SpinTires.patch
-	(
-		printf '%s\n' '+    { "Józef Kucia", "wined3d: Improve dirt rendering in SpinTires.", 1 },';
-	) >> "$patchlist"
-fi
-
 # Patchset wined3d-WINED3D_RS_COLORWRITEENABLE
 # |
 # | Modified files:
diff --git a/patches/wined3d-Improved-RCP_Support/definition b/patches/wined3d-Improved-RCP_Support/definition
index ef4c5e65..45ea4b85 100644
--- a/patches/wined3d-Improved-RCP_Support/definition
+++ b/patches/wined3d-Improved-RCP_Support/definition
@@ -1,2 +1,5 @@
+# Currently causing regressions.
+# https://bugs.winehq.org/show_bug.cgi?id=46148
 Fixes: [36089] Improve dirt rendering in SpinTires
 Fixes: [45375] Halo online black display problems
+Disabled: True