diff --git a/panda/src/gobj/geom.h b/panda/src/gobj/geom.h
index 80baa3320a..eb9b049dbd 100644
--- a/panda/src/gobj/geom.h
+++ b/panda/src/gobj/geom.h
@@ -202,7 +202,7 @@ private:
   // if we could simplify the cache system now.
 
   // The pipelined data with each CacheEntry.
-  class CDataCache : public CycleData {
+  class EXPCL_PANDA_GOBJ CDataCache : public CycleData {
   public:
     INLINE CDataCache();
     INLINE CDataCache(const CDataCache &copy);
diff --git a/panda/src/gobj/geomVertexData.h b/panda/src/gobj/geomVertexData.h
index 07b0dbc6d7..f81614eab5 100644
--- a/panda/src/gobj/geomVertexData.h
+++ b/panda/src/gobj/geomVertexData.h
@@ -195,7 +195,7 @@ private:
   typedef pvector< COWPT(GeomVertexArrayData) > Arrays;
 
   // The pipelined data with each CacheEntry.
-  class CDataCache : public CycleData {
+  class EXPCL_PANDA_GOBJ CDataCache : public CycleData {
   public:
     INLINE CDataCache();
     INLINE CDataCache(const CDataCache &copy);