diff --git a/include/PR/r4300.h b/include/PR/R4300.h
similarity index 100%
rename from include/PR/r4300.h
rename to include/PR/R4300.h
diff --git a/include/ultra64.h b/include/ultra64.h
index 06a6a7898f..0264c844a5 100644
--- a/include/ultra64.h
+++ b/include/ultra64.h
@@ -16,7 +16,7 @@
 #include "PR/rcp.h"
 #include "PR/rdp.h"
 #include "PR/rsp.h"
-#include "PR/r4300.h"
+#include "PR/R4300.h"
 #include "PR/ucode.h"
 #include "PR/viint.h"
 #include "PR/xstdio.h"