diff --git a/IO/config/ImageLoader.h.in b/IO/config/ImageLoader.h.in
index 3d9e363..b65d23b 100644
--- a/IO/config/ImageLoader.h.in
+++ b/IO/config/ImageLoader.h.in
@@ -94,7 +94,7 @@ class ImageLoader {
 
   uint32 GetChannelForPixel(uint32 x, uint32 y, uint32 ch);
 
-  bool LoadFromPixelBuffer(uint32 *data, bool flipY = false);
+  bool LoadFromPixelBuffer(const uint32 *data, bool flipY = false);
 
  public:
   virtual ~ImageLoader() {
diff --git a/IO/src/ImageLoader.cpp b/IO/src/ImageLoader.cpp
index 37df083..b65bb94 100644
--- a/IO/src/ImageLoader.cpp
+++ b/IO/src/ImageLoader.cpp
@@ -137,7 +137,7 @@ unsigned int ImageLoader::GetChannelForPixel(uint32 x, uint32 y, uint32 ch) {
   return val;
 }
 
-bool ImageLoader::LoadFromPixelBuffer(uint32 *data, bool flipY) {
+bool ImageLoader::LoadFromPixelBuffer(const uint32 *data, bool flipY) {
   m_RedChannelPrecision = 8;
   m_GreenChannelPrecision = 8;
   m_BlueChannelPrecision = 8;