2 files changed, 5 insertions, 4 deletions
diff --git a/src/extension/internal/pdfinput/pdf-input.cpp b/src/extension/internal/pdfinput/pdf-input.cpp
index 531cda20a..b04c9782f 100644
--- a/src/extension/internal/pdfinput/pdf-input.cpp
+++ b/src/extension/internal/pdfinput/pdf-input.cpp
@@ -32,6 +32,7 @@
 #endif
 
 #include <gtkmm/alignment.h>
+#include <gtkmm/checkbutton.h>
 #include <gtkmm/comboboxtext.h>
 #include <gtkmm/drawingarea.h>
 #include <gtkmm/frame.h>
diff --git a/src/extension/internal/pdfinput/svg-builder.h b/src/extension/internal/pdfinput/svg-builder.h
index a550565d6..610822959 100644
--- a/src/extension/internal/pdfinput/svg-builder.h
+++ b/src/extension/internal/pdfinput/svg-builder.h
@@ -19,7 +19,7 @@
 class SPDocument;
 namespace Inkscape {
     namespace XML {
-        class Document;
+        struct Document;
         class Node;
     }
 }
@@ -31,10 +31,10 @@ namespace Inkscape {
 #include "CharTypes.h"
 class GooString;
 class Function;
-struct GfxState;
-class GfxColor;
+class GfxState;
+struct GfxColor;
 class GfxColorSpace;
-class GfxRGB;
+struct GfxRGB;
 class GfxPath;
 class GfxPattern;
 class GfxTilingPattern;