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-rw-r--r--configure.in1
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index 9e44096..2f771c8 100644
--- a/configure.in
+++ b/configure.in
@@ -107,6 +107,7 @@ AC_MSG_CHECKING("TCL_THREADS")
AC_EGREP_CPP(yes,
[
#define WITH_THREAD
+#include <tcl.h>
#include <_tkinter.h>
#ifdef TCL_THREADS
yes