diff --git a/include/rvl/DVD/dvdfs.h b/include/rvl/DVD/dvdfs.h
index c0747f47..1a0434ff 100644
--- a/include/rvl/DVD/dvdfs.h
+++ b/include/rvl/DVD/dvdfs.h
@@ -1,7 +1,7 @@
 #ifndef RVL_SDK_DVD_FS_H
 #define RVL_SDK_DVD_FS_H
-#include <RVL/DVD/dvd.h>
-#include <RVL/OS.h>
+#include <rvl/DVD/dvd.h>
+#include <rvl/OS.h>
 #include <common.h>
 
 #ifdef __cplusplus
diff --git a/include/rvl/DVD/dvdidutils.h b/include/rvl/DVD/dvdidutils.h
index 23a7d3df..ce832689 100644
--- a/include/rvl/DVD/dvdidutils.h
+++ b/include/rvl/DVD/dvdidutils.h
@@ -1,6 +1,6 @@
 #ifndef RVL_SDK_DVD_ID_UTILS_H
 #define RVL_SDK_DVD_ID_UTILS_H
-#include <RVL/DVD/dvd.h>
+#include <rvl/DVD/dvd.h>
 #include <common.h>
 
 #ifdef __cplusplus
diff --git a/include/rvl/DVD/dvdqueue.h b/include/rvl/DVD/dvdqueue.h
index 0b3a7a3d..977d79aa 100644
--- a/include/rvl/DVD/dvdqueue.h
+++ b/include/rvl/DVD/dvdqueue.h
@@ -1,6 +1,6 @@
 #ifndef RVL_SDK_DVD_QUEUE_H
 #define RVL_SDK_DVD_QUEUE_H
-#include <RVL/DVD/dvd.h>
+#include <rvl/DVD/dvd.h>
 #include <common.h>
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/rvl/GX/GXInit.h b/include/rvl/GX/GXInit.h
index cdae0895..f883273d 100644
--- a/include/rvl/GX/GXInit.h
+++ b/include/rvl/GX/GXInit.h
@@ -1,6 +1,6 @@
 #ifndef RVL_SDK_GX_INIT_H
 #define RVL_SDK_GX_INIT_H
-#include <RVL/GX/GXFifo.h>
+#include <rvl/GX/GXFifo.h>
 #include <common.h>
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/nw4r/ut/ut_DvdLockedFileStream.cpp b/src/nw4r/ut/ut_DvdLockedFileStream.cpp
index 20e84897..a327b252 100644
--- a/src/nw4r/ut/ut_DvdLockedFileStream.cpp
+++ b/src/nw4r/ut/ut_DvdLockedFileStream.cpp
@@ -1,6 +1,6 @@
 // Ported From https://github.com/kiwi515/ogws/blob/master/src/nw4r/ut/ut_DvdLockedFileStream.cpp
 
-#include <RVL/OS.h>
+#include <rvl/OS.h>
 #include <nw4r/ut.h>
 
 namespace nw4r {