diff --git a/reference/opt/shaders-hlsl/frag/dual-source-blending.frag b/reference/opt/shaders-hlsl/frag/dual-source-blending.frag
new file mode 100644
index 00000000..961e8000
--- /dev/null
+++ b/reference/opt/shaders-hlsl/frag/dual-source-blending.frag
@@ -0,0 +1,23 @@
+static float4 FragColor0;
+static float4 FragColor1;
+
+struct SPIRV_Cross_Output
+{
+    float4 FragColor0 : SV_Target0;
+    float4 FragColor1 : SV_Target1;
+};
+
+void frag_main()
+{
+    FragColor0 = 1.0f.xxxx;
+    FragColor1 = 2.0f.xxxx;
+}
+
+SPIRV_Cross_Output main()
+{
+    frag_main();
+    SPIRV_Cross_Output stage_output;
+    stage_output.FragColor0 = FragColor0;
+    stage_output.FragColor1 = FragColor1;
+    return stage_output;
+}
diff --git a/reference/shaders-hlsl/frag/dual-source-blending.frag b/reference/shaders-hlsl/frag/dual-source-blending.frag
new file mode 100644
index 00000000..961e8000
--- /dev/null
+++ b/reference/shaders-hlsl/frag/dual-source-blending.frag
@@ -0,0 +1,23 @@
+static float4 FragColor0;
+static float4 FragColor1;
+
+struct SPIRV_Cross_Output
+{
+    float4 FragColor0 : SV_Target0;
+    float4 FragColor1 : SV_Target1;
+};
+
+void frag_main()
+{
+    FragColor0 = 1.0f.xxxx;
+    FragColor1 = 2.0f.xxxx;
+}
+
+SPIRV_Cross_Output main()
+{
+    frag_main();
+    SPIRV_Cross_Output stage_output;
+    stage_output.FragColor0 = FragColor0;
+    stage_output.FragColor1 = FragColor1;
+    return stage_output;
+}
diff --git a/shaders-hlsl/frag/dual-source-blending.frag b/shaders-hlsl/frag/dual-source-blending.frag
new file mode 100644
index 00000000..f322cf4c
--- /dev/null
+++ b/shaders-hlsl/frag/dual-source-blending.frag
@@ -0,0 +1,10 @@
+#version 450
+
+layout(location = 0, index = 0) out vec4 FragColor0;
+layout(location = 0, index = 1) out vec4 FragColor1;
+
+void main()
+{
+	FragColor0 = vec4(1.0);
+	FragColor1 = vec4(2.0);
+}
diff --git a/spirv_hlsl.cpp b/spirv_hlsl.cpp
index 486fec54..404a8292 100644
--- a/spirv_hlsl.cpp
+++ b/spirv_hlsl.cpp
@@ -805,7 +805,14 @@ void CompilerHLSL::emit_interface_block_in_struct(const SPIRVariable &var, unord
 	bool legacy = hlsl_options.shader_model <= 30;
 	if (execution.model == ExecutionModelFragment && var.storage == StorageClassOutput)
 	{
-		binding = join(legacy ? "COLOR" : "SV_Target", get_decoration(var.self, DecorationLocation));
+		// Dual-source blending is achieved in HLSL by emitting to SV_Target0 and 1.
+		uint32_t index = get_decoration(var.self, DecorationIndex);
+		uint32_t location = get_decoration(var.self, DecorationLocation);
+
+		if (index != 0 && location != 0)
+			SPIRV_CROSS_THROW("Dual-source blending is only supported on MRT #0 in HLSL.");
+
+		binding = join(legacy ? "COLOR" : "SV_Target", location + index);
 		use_location_number = false;
 		if (legacy) // COLOR must be a four-component vector on legacy shader model targets (HLSL ERR_COLOR_4COMP)
 			type.vecsize = 4;