diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU.cs
index 4984fa8ea3..59592a9834 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU.cs
@@ -346,6 +346,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
 									last_HBL = LY;
 									HBL_HDMA_count = 0x10;
 									HBL_HDMA_go = false;
+									HDMA_countdown = 4;
 								}
 
 								HDMA_tick++;
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU_GB.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU_GB.cs
index 368a86460e..2f92074551 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU_GB.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU_GB.cs
@@ -348,6 +348,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
 									last_HBL = LY;
 									HBL_HDMA_count = 0x10;
 									HBL_HDMA_go = false;
+									HDMA_countdown = 4;
 								}
 
 								HDMA_tick++;