diff --git a/src/RageTextureManager.cpp b/src/RageTextureManager.cpp
index df0f723677..ff67b4bc4f 100644
--- a/src/RageTextureManager.cpp
+++ b/src/RageTextureManager.cpp
@@ -311,7 +311,7 @@ RageTextureManager::GarbageCollect(GCType type)
 	if (PREFSMAN->m_verbose_log > 1)
 		LOG->Trace("Performing texture garbage collection.");
 
-	for (auto ID : m_mapPathToTexture) {
+	for (auto& ID : m_mapPathToTexture) {
 		RageTexture* t = ID.second;
 
 		if (t->m_iRefCount)