1 files changed, 1 insertions, 0 deletions
diff --git a/configure b/configure
index 0520827..f26d09a 100755
--- a/configure
+++ b/configure
@@ -2180,6 +2180,7 @@ cat > conftest.$ac_ext <<EOF
 #include "confdefs.h"
 
 #define WITH_THREAD
+#include <tcl.h>
 #include <_tkinter.h>
 #ifdef TCL_THREADS
 yes