diff --git a/src/applications/osgearth_biome/osgearth_biome.cpp b/src/applications/osgearth_biome/osgearth_biome.cpp
index 30f9816e42..a767db75a6 100644
--- a/src/applications/osgearth_biome/osgearth_biome.cpp
+++ b/src/applications/osgearth_biome/osgearth_biome.cpp
@@ -19,8 +19,6 @@
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */
-#include <osgEarthImGui/ImGuiApp>
-
 #include <osgEarth/Notify>
 #include <osgEarth/EarthManipulator>
 #include <osgEarth/ExampleResources>
diff --git a/src/osgEarthImGui/ImGuiPanel b/src/osgEarthImGui/ImGuiPanel
index 8b8d07e417..19ebb21b44 100644
--- a/src/osgEarthImGui/ImGuiPanel
+++ b/src/osgEarthImGui/ImGuiPanel
@@ -23,6 +23,9 @@
 #include <osgEarth/BuildConfig>
 #include <osgEarth/Config>
 #include <osgEarth/GLUtils>
+#include <osgEarth/MapNode>
+#include <osgEarth/Terrain>
+#include <osgEarth/GeoData>
 
 #include <osgDB/ReadFile>
 #include <osg/observer_ptr>