diff --git a/unix/tkglGLX.c b/unix/tkglGLX.c
index 22d87b9..2946080 100644
--- a/unix/tkglGLX.c
+++ b/unix/tkglGLX.c
@@ -831,7 +831,9 @@ void Tkgl_FreeResources(
 void
 Tkgl_WorldChanged(
     void* instanceData){
+#if 0
     printf("WorldChanged\n");
+#endif
 }
 
 int
@@ -839,7 +841,9 @@ Tkgl_TakePhoto(
     Tkgl *tkglPtr,
     Tk_PhotoHandle photo)
 {
+#if 0
     printf("TakePhoto\n");
+#endif
     return TCL_OK;
 }
 
@@ -849,7 +853,9 @@ Tkgl_CopyContext(
     const Tkgl *to,
     unsigned mask)
 {
+#if 0
     printf("CopyContext\n");
+#endif
     return TCL_OK;
 }
 
diff --git a/win/tkglWGL.c b/win/tkglWGL.c
index cd15ab5..6c08673 100644
--- a/win/tkglWGL.c
+++ b/win/tkglWGL.c
@@ -908,7 +908,9 @@ const char* Tkgl_GetExtensions(
 void
 Tkgl_WorldChanged(
     void* instanceData){
+#if 0
     printf("WorldChanged\n");
+#endif
 }
 
 
@@ -917,7 +919,9 @@ Tkgl_TakePhoto(
     Tkgl *tkglPtr,
     Tk_PhotoHandle photo)
 {
+#if 0
     printf("TakePhoto\n");
+#endif
     return TCL_OK;
 }
 
@@ -928,7 +932,9 @@ Tkgl_CopyContext(
     const Tkgl *to,
     unsigned mask)
 {
+#if 0
     printf("CopyContext\n");
+#endif
     return TCL_OK;
 }