diff --git a/pcsx2/GS/GSState.cpp b/pcsx2/GS/GSState.cpp
index e3419157f0..f51e21f8dc 100644
--- a/pcsx2/GS/GSState.cpp
+++ b/pcsx2/GS/GSState.cpp
@@ -552,7 +552,7 @@ float GSState::GetTvRefreshRate()
 	__assume(0); // unreachable
 }
 
-void GSState::DumpVertices(std::string& filename)
+void GSState::DumpVertices(const std::string& filename)
 {
 	std::ofstream file(filename);
 
diff --git a/pcsx2/GS/GSState.h b/pcsx2/GS/GSState.h
index f16e736130..2dc34c0513 100644
--- a/pcsx2/GS/GSState.h
+++ b/pcsx2/GS/GSState.h
@@ -303,7 +303,7 @@ public:
 	void SetRegsMem(u8* basemem) { m_regs = reinterpret_cast<GSPrivRegSet*>(basemem); }
 
 	void SetFrameSkip(int skip);
-	void DumpVertices(std::string& filename);
+	void DumpVertices(const std::string& filename);
 
 	PRIM_OVERLAP PrimitiveOverlap();
 	GIFRegTEX0 GetTex0Layer(u32 lod);