diff --git a/Source/Core/VideoCommon/BPStructs.cpp b/Source/Core/VideoCommon/BPStructs.cpp
index b4d3cce959..cacb005143 100644
--- a/Source/Core/VideoCommon/BPStructs.cpp
+++ b/Source/Core/VideoCommon/BPStructs.cpp
@@ -241,7 +241,7 @@ static void BPWritten(const BPCmd& bp)
 				else
 					yScale = (float)bpmem.dispcopyyscale / 256.0f;
 
-				float num_xfb_lines = ((bpmem.copyTexSrcWH.y + 1.0f) * yScale);
+				float num_xfb_lines = 1.0f + bpmem.copyTexSrcWH.y  * yScale;
 
 				u32 height = static_cast<u32>(num_xfb_lines);
 				if (height > MAX_XFB_HEIGHT)