diff --git a/panda/src/gui/guiBehavior.I b/panda/src/gui/guiBehavior.I
new file mode 100644
index 0000000000..93561b1dab
--- /dev/null
+++ b/panda/src/gui/guiBehavior.I
@@ -0,0 +1,7 @@
+// Filename: guiBehavior.I
+// Created by:  cary (07Feb01)
+// 
+////////////////////////////////////////////////////////////////////
+
+GuiBehavior::GuiBehavior(void) {
+}