diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index 7813b2a17..9688d5b7c 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -440,6 +440,7 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
                         return result.Cast<u8>();
                     }
 
+                    case Operation::Dot3RGB:
                     case Operation::Dot3RGBA:
                     {
                         //return std::inner_product(begin(a), end(a), begin(b), 0.0);
@@ -493,9 +494,17 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
                     case Operation::Subtract:
                         return std::max(0, (int)input[0] - (int)input[1]);
 
-                    case Operation::Dot3RGBA:
+                    case Operation::Dot3RGB:
                         return 255;
 
+                    case Operation::Dot3RGBA:
+                        //return std::inner_product(begin(a), end(a), begin(b), 0.0);
+                        int a[] = { input[0].r(), input[0].g(), input[0].b() }; //int a[] = { 1, 3, -5 };
+                        int b[] = { input[1].r(), input[1].g(), input[1].b() };
+
+                        auto res = std::inner_product(a, a + sizeof(a) / sizeof(a[0]), b, 0);
+                        return res;
+
                     case Operation::MultiplyThenAdd:
                         return std::min(255, (input[0] * input[1] + 255 * input[2]) / 255);