diff --git a/src/plugins/diffeditor/diffutils.h b/src/plugins/diffeditor/diffutils.h
index 460674d4b03..6e7e2143f5e 100644
--- a/src/plugins/diffeditor/diffutils.h
+++ b/src/plugins/diffeditor/diffutils.h
@@ -21,7 +21,7 @@ namespace Utils { class Diff; }
 
 namespace DiffEditor {
 
-class DiffFileInfo {
+class DIFFEDITOR_EXPORT DiffFileInfo {
 public:
     enum PatchBehaviour {
         PatchFile,