diff --git a/GPU/GPUCommon.cpp b/GPU/GPUCommon.cpp
index a48ab68f7c..4305917502 100644
--- a/GPU/GPUCommon.cpp
+++ b/GPU/GPUCommon.cpp
@@ -1867,6 +1867,18 @@ void GPUCommon::DoBlockTransfer(u32 skipDrawReason) {
 }
 
 bool GPUCommon::PerformMemoryCopy(u32 dest, u32 src, int size, GPUCopyFlag flags) {
+	/*
+	// TODO: Should add this. But let's do it after the 1.18 release.
+	if (dest == 0 || src == 0) {
+		_dbg_assert_msg_(false, "Bad PerformMemoryCopy: %08x -> %08x, size %d (flag: %d)", src, dest, size, (int)flags);
+		return false;
+	}
+	*/
+	if (size == 0) {
+		_dbg_assert_msg_(false, "Zero-sized PerformMemoryCopy: %08x -> %08x, size %d (flag: %d)", src, dest, size, (int)flags);
+		// Let's not ignore this yet but if we hit this, we should investigate.
+	}
+
 	// Track stray copies of a framebuffer in RAM. MotoGP does this.
 	if (framebufferManager_->MayIntersectFramebufferColor(src) || framebufferManager_->MayIntersectFramebufferColor(dest)) {
 		if (!framebufferManager_->NotifyFramebufferCopy(src, dest, size, flags, gstate_c.skipDrawReason)) {