diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Core.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Core.cs
index 15f578f8b2..c14a213bcb 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/Core.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Core.cs
@@ -195,7 +195,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 				WriteMemory(0x2004, db);
 				addr++;
 			}
-			cpu.PendingCycles -= 512;
+			cpu.PendingCycles -= 513;
 		}
 
 		/// <summary>