diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index 6fc8b1bc5..9dd5ff234 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -130,16 +130,16 @@ struct Regs {
         };
 
         union {
-            BitField< 0, 16, u32> left;
-            BitField<16, 16, u32> top;
+            BitField< 0, 16, u32> left_minus_1;
+            BitField<16, 16, u32> top_minus_1;
         };
 
-        u32 GetWidth() const {
-            return left - right + 1;
+        u32 GetTop() const {
+            return top_minus_1 + 1;
         }
 
-        u32 GetHeight() const {
-            return top - bottom + 1;
+        u32 GetLeft() const {
+            return left_minus_1 + 1;
         }
     } scissor_test;
 
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index 10ec818c2..6a3b1c519 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -340,17 +340,17 @@ static void ProcessTriangleInternal(const Shader::OutputVertex& v0,
     u16 max_y = std::max({vtxpos[0].y, vtxpos[1].y, vtxpos[2].y});
 
     // Convert the scissor box coordinates to 12.4 fixed point
-    u16 scissor_width = (u16)(regs.scissor_test.GetWidth() << 4);
-    u16 scissor_height = (u16)(regs.scissor_test.GetHeight() << 4);
-    u16 scissor_x = (u16)(regs.scissor_test.right << 4);
-    u16 scissor_y = (u16)(regs.scissor_test.bottom << 4);
+    u16 scissor_left = (u16)(regs.scissor_test.GetLeft() << 4);
+    u16 scissor_top = (u16)(regs.scissor_test.GetTop() << 4);
+    u16 scissor_right = (u16)(regs.scissor_test.right << 4);
+    u16 scissor_bottom = (u16)(regs.scissor_test.bottom << 4);
 
     if (regs.scissor_test.mode == Regs::ScissorMode::Include) {
         // Calculate the new bounds
-        min_x = std::max(min_x, scissor_x);
-        min_y = std::max(min_y, scissor_y);
-        max_x = std::min(max_x, (u16)(scissor_x + scissor_width));
-        max_y = std::min(max_y, (u16)(scissor_y + scissor_height));
+        min_x = std::max(min_x, scissor_right);
+        min_y = std::max(min_y, scissor_bottom);
+        max_x = std::min(max_x, scissor_left);
+        max_y = std::min(max_y, scissor_top);
     }
 
     min_x &= Fix12P4::IntMask();
@@ -394,8 +394,8 @@ static void ProcessTriangleInternal(const Shader::OutputVertex& v0,
 
             // Do not process the pixel if it's inside the scissor box and the scissor mode is set to Exclude
             if (regs.scissor_test.mode == Regs::ScissorMode::Exclude &&
-                x >= scissor_x && x <= scissor_x + scissor_width &&
-                y >= scissor_y && y <= scissor_y + scissor_height) {
+                x >= scissor_right && x <= scissor_left &&
+                y >= scissor_bottom && y <= scissor_top) {
                 continue;
             }
 
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 2ea0ba2a2..be97e7221 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -227,7 +227,7 @@ void RasterizerOpenGL::NotifyPicaRegisterChanged(u32 id) {
         state.draw.shader_dirty = true;
         break;
     case PICA_REG_INDEX(scissor_test.right):
-    case PICA_REG_INDEX(scissor_test.left):
+    case PICA_REG_INDEX(scissor_test.left_minus_1):
         SyncScissorTest();
         break;
 
@@ -672,13 +672,13 @@ void RasterizerOpenGL::SyncScissorTest() {
 
     if (uniform_block_data.data.scissor_right != regs.scissor_test.right ||
         uniform_block_data.data.scissor_bottom != regs.scissor_test.bottom ||
-        uniform_block_data.data.scissor_left != regs.scissor_test.left + 1 ||
-        uniform_block_data.data.scissor_top != regs.scissor_test.top + 1) {
+        uniform_block_data.data.scissor_left != regs.scissor_test.GetLeft() ||
+        uniform_block_data.data.scissor_top != regs.scissor_test.GetTop()) {
 
         uniform_block_data.data.scissor_right = regs.scissor_test.right;
         uniform_block_data.data.scissor_bottom = regs.scissor_test.bottom;
-        uniform_block_data.data.scissor_left = regs.scissor_test.left + 1;
-        uniform_block_data.data.scissor_top = regs.scissor_test.top + 1;
+        uniform_block_data.data.scissor_left = regs.scissor_test.GetLeft();
+        uniform_block_data.data.scissor_top = regs.scissor_test.GetTop();
         uniform_block_data.dirty = true;
     }
 }