diff --git a/core/annotations.h b/core/annotations.h
index 24faaae4f..3eea02e24 100644
--- a/core/annotations.h
+++ b/core/annotations.h
@@ -27,7 +27,7 @@ class Annotation;
 /**
  * @short Helper class for (recursive) annotation retrieval/storage.
  */
-class AnnotationUtils
+class OKULAR_EXPORT AnnotationUtils
 {
     public:
         /**
@@ -390,7 +390,7 @@ class OKULAR_EXPORT Annotation
          * The Window class contains all information about the popup window
          * of the annotation that is used to edit the content and properties.
          */
-        class Window
+        class OKULAR_EXPORT Window
         {
             public:
                 /**
@@ -1016,7 +1016,7 @@ class OKULAR_EXPORT HighlightAnnotation : public Annotation
          * The Quad class contains 8 coordinates and style definitions
          * which describe a line part of the whole highlight annotation.
          */
-        class Quad
+        class OKULAR_EXPORT Quad
         {
             public:
                 /**
diff --git a/core/observer.h b/core/observer.h
index db0faa0de..3bb26f470 100644
--- a/core/observer.h
+++ b/core/observer.h
@@ -14,6 +14,8 @@
 #include <QtCore/QRect>
 #include <QtCore/QVector>
 
+#include "okular_export.h"
+
 namespace Okular {
 
 /** IDs for observers. Globally defined here. **/
@@ -46,7 +48,7 @@ class Page;
  * Inherit this class and call Document->addObserver( yourClass ) to get
  * notified of asynchronous events (new pixmap generated, or changed, etc..).
  */
-class DocumentObserver
+class OKULAR_EXPORT DocumentObserver
 {
     public:
         /**
diff --git a/core/textpage.h b/core/textpage.h
index f6994154d..4d152fa5c 100644
--- a/core/textpage.h
+++ b/core/textpage.h
@@ -48,7 +48,7 @@ typedef enum SearchDirection{ FromTop, FromBottom, NextResult, PreviousResult };
  * Also some document types have glyphes - sets of characters rendered as one, so in search they should
  * appear as a text but are only one character when drawn on screen. We need to allow this.
  */
-class TextEntity
+class OKULAR_EXPORT TextEntity
 {
     public:
         typedef QList<TextEntity*> List;
@@ -100,7 +100,7 @@ class TextEntity
  * providing @see TextEntity items for every word/character of
  * the page.
  */
-class TextPage
+class OKULAR_EXPORT TextPage
 {
     public:
         /**