diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7daf1a57..38d47071 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,7 @@ else()
 endif()
 
 if(ENABLE_LTO)
-	add_compile_options(-O2 -flto)
+	add_compile_options(-O3 -flto)
 endif()
 
 add_compile_options(-fno-pic)
diff --git a/src/GPU2D.h b/src/GPU2D.h
index 21b43f1f..57436c73 100644
--- a/src/GPU2D.h
+++ b/src/GPU2D.h
@@ -71,11 +71,11 @@ private:
 
     bool Accelerated;
 
-    u32 BGOBJLine[256*3];
+    u32 BGOBJLine[256*3] __attribute__((aligned (8)));
     u32* _3DLine;
 
-    u8 WindowMask[256];
-    u32 OBJLine[256];
+    u8 WindowMask[256] __attribute__((aligned (8)));
+    u32 OBJLine[256] __attribute__((aligned (8)));
 
     u16 DispFIFO[16];
     u32 DispFIFOReadPtr;