diff --git a/panda/src/grutil/cardMaker.h b/panda/src/grutil/cardMaker.h
index 81b76d12ee..12fecac204 100644
--- a/panda/src/grutil/cardMaker.h
+++ b/panda/src/grutil/cardMaker.h
@@ -30,7 +30,7 @@
 //               rectangular polygons, particularly useful for showing
 //               textures etc. in the 2-d scene graph.
 ////////////////////////////////////////////////////////////////////
-class CardMaker {
+class EXPCL_PANDA CardMaker {
 PUBLISHED:
   INLINE CardMaker();
   INLINE ~CardMaker();
diff --git a/panda/src/grutil/lineSegs.h b/panda/src/grutil/lineSegs.h
index 7e69c83e56..85ac2cd9fa 100644
--- a/panda/src/grutil/lineSegs.h
+++ b/panda/src/grutil/lineSegs.h
@@ -38,7 +38,7 @@
 //               smartest it could possibly be; it's intended
 //               primarily as a visualization and editing tool.
 ////////////////////////////////////////////////////////////////////
-class LineSegs {
+class EXPCL_PANDA LineSegs {
 PUBLISHED:
   LineSegs();
   ~LineSegs();