diff --git a/intern/cycles/render/image.cpp b/intern/cycles/render/image.cpp
index 076cc3d8b63..eb2c3333c44 100644
--- a/intern/cycles/render/image.cpp
+++ b/intern/cycles/render/image.cpp
@@ -176,6 +176,10 @@ int ImageManager::add_image(const string& filename, void *builtin_data, bool ani
 					img->frame = frame;
 					img->need_load = true;
 				}
+				if(img->use_alpha != use_alpha) {
+					img->use_alpha = use_alpha;
+					img->need_load = true;
+				}
 				img->users++;
 				return slot;
 			}
@@ -219,6 +223,10 @@ int ImageManager::add_image(const string& filename, void *builtin_data, bool ani
 					img->frame = frame;
 					img->need_load = true;
 				}
+				if(img->use_alpha != use_alpha) {
+					img->use_alpha = use_alpha;
+					img->need_load = true;
+				}
 				img->users++;
 				return slot+tex_image_byte_start;
 			}