diff --git a/lib/tesseract/c/baseapi.rb b/lib/tesseract/c/baseapi.rb
index c76200f..5403725 100644
--- a/lib/tesseract/c/baseapi.rb
+++ b/lib/tesseract/c/baseapi.rb
@@ -167,7 +167,7 @@ module BaseAPI
 		}
 
 		cpp.function %{
-			void set_image (TessBaseAPI* api, const Pix* pix) {
+			void set_image (TessBaseAPI* api, Pix* pix) {
 				api->SetImage(pix);
 			}
 		}
@@ -179,13 +179,13 @@ module BaseAPI
 		}
 
 		cpp.function %{
-			bool process_pages (TessBaseAPI* api, const char* filename, STRING* output) {
+			bool process_pages (TessBaseAPI* api, const char* filename, TessResultRenderer* output) {
 				return api->ProcessPages(filename, NULL, 0, output);
 			}
 		}, blocking: true
 
 		cpp.function %{
-			bool process_page (TessBaseAPI* api, Pix* pix, int page_index, const char* filename, STRING* output) {
+			bool process_page (TessBaseAPI* api, Pix* pix, int page_index, const char* filename, TessResultRenderer* output) {
 				return api->ProcessPage(pix, page_index, filename, NULL, 0, output);
 			}
 		}, blocking: true
diff --git a/lib/tesseract/c/iterator.rb b/lib/tesseract/c/iterator.rb
index 421bd1c..3144906 100644
--- a/lib/tesseract/c/iterator.rb
+++ b/lib/tesseract/c/iterator.rb
@@ -198,7 +198,7 @@ module Iterator
 			Image get_image (PageIterator* it, PageIteratorLevel level, int padding) {
 				Image result;
 
-				result.pix = it->GetImage(level, padding, &result.x, &result.y);
+				result.pix = it->GetImage(level, padding, result.pix, &result.x, &result.y);
 
 				return result;
 			}