diff --git a/src/graphics/host_gpu/renderer/image/tiler.cpp b/src/graphics/host_gpu/renderer/image/tiler.cpp
index 3b524e7a2..7d3c1d4b0 100644
--- a/src/graphics/host_gpu/renderer/image/tiler.cpp
+++ b/src/graphics/host_gpu/renderer/image/tiler.cpp
@@ -484,7 +484,7 @@ void TileManager::ConvertD16(Result source, Result target, D16Direction directio
 	                            vk::AccessFlagBits::eHostWrite |
 	                            vk::AccessFlagBits::eTransferWrite |
 	                            vk::AccessFlagBits::eShaderWrite;
-	barriers[1].dstAccessMask = vk::AccessFlagBits::eShaderRead | vk::AccessFlagBits::eShaderWrite;
+	barriers[1].dstAccessMask = vk::AccessFlagBits::eShaderWrite;
 	command.pipelineBarrier(
 	    vk::PipelineStageFlagBits::eAllCommands | vk::PipelineStageFlagBits::eHost,
 	    vk::PipelineStageFlagBits::eComputeShader, {}, 0, nullptr, 2, barriers, 0, nullptr);
diff --git a/src/graphics/host_gpu/shaders/gpu_tiler_demote_d16.comp b/src/graphics/host_gpu/shaders/gpu_tiler_demote_d16.comp
index fb9655fb3..843a164ca 100644
--- a/src/graphics/host_gpu/shaders/gpu_tiler_demote_d16.comp
+++ b/src/graphics/host_gpu/shaders/gpu_tiler_demote_d16.comp
@@ -1,10 +1,11 @@
 #version 450
+#extension GL_EXT_shader_16bit_storage : require
 
 layout(constant_id = 0) const uint D32 = 0u;
 layout(local_size_x = 64) in;
 
 layout(set = 0, binding = 0, std430) readonly buffer Input { uint data[]; } input_buffer;
-layout(set = 0, binding = 1, std430) buffer Output { uint data[]; } output_buffer;
+layout(set = 0, binding = 1, std430) buffer Output { uint16_t data[]; } output_buffer;
 
 layout(push_constant, std430) uniform Conversion {
 	uint src_base;
@@ -32,9 +33,5 @@ void main() {
 	}
 	uint src = params.src_base + y * params.source_pitch + x * 4u;
 	uint dst = params.dst_base + y * params.target_pitch + x * 2u;
-	uint shift = (dst & 2u) * 8u;
-	uint mask = 0xffffu << shift;
-	uint word = dst >> 2u;
-	atomicAnd(output_buffer.data[word], ~mask);
-	atomicOr(output_buffer.data[word], decode(input_buffer.data[src >> 2u]) << shift);
+	output_buffer.data[dst >> 1u] = uint16_t(decode(input_buffer.data[src >> 2u]));
 }