diff --git a/src/core/services/gsp_gpu.cpp b/src/core/services/gsp_gpu.cpp
index 340f9561..3741a536 100644
--- a/src/core/services/gsp_gpu.cpp
+++ b/src/core/services/gsp_gpu.cpp
@@ -155,6 +155,8 @@ void GPUService::flushDataCache(u32 messagePointer) {
 	u32 size = mem.read32(messagePointer + 8);
 	u32 processHandle = handle = mem.read32(messagePointer + 16);
 	printf("GSP::GPU::FlushDataCache(address = %08X, size = %X, process = %X\n", address, size, processHandle);
+
+	mem.write32(messagePointer + 4, Result::Success);
 }
 
 void GPUService::setLCDForceBlack(u32 messagePointer) {
@@ -164,4 +166,6 @@ void GPUService::setLCDForceBlack(u32 messagePointer) {
 	if (flag != 0) {
 		printf("Filled both LCDs with black\n");
 	}
+
+	mem.write32(messagePointer + 4, Result::Success);
 }
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