diff --git a/desmume/src/GPU.cpp b/desmume/src/GPU.cpp
index c4b094e9d..7633b40b8 100644
--- a/desmume/src/GPU.cpp
+++ b/desmume/src/GPU.cpp
@@ -5649,6 +5649,7 @@ void GPUSubsystem::SetCustomFramebufferSize(size_t w, size_t h, u16 *clientNativ
 	
 	this->_engineMain->SetCustomFramebufferSize(w, h);
 	this->_engineSub->SetCustomFramebufferSize(w, h);
+	BaseRenderer->SetFramebufferSize(w, h); // Since BaseRenderer is persistent, we need to update this manually.
 	CurrentRenderer->SetFramebufferSize(w, h);
 	
 	if (this->_displayInfo.didPerformCustomRender[NDSDisplayID_Main])