diff --git a/src/video_core/memory_manager.h b/src/video_core/memory_manager.h
index 4f7b57f8e..f69a25706 100644
--- a/src/video_core/memory_manager.h
+++ b/src/video_core/memory_manager.h
@@ -47,7 +47,7 @@ struct VirtualMemoryArea {
 
 class MemoryManager final {
 public:
-    MemoryManager(VideoCore::RasterizerInterface& rasterizer);
+    explicit MemoryManager(VideoCore::RasterizerInterface& rasterizer);
     ~MemoryManager();
 
     GPUVAddr AllocateSpace(u64 size, u64 align);