diff --git a/src/Tk/tkImaging.c b/src/Tk/tkImaging.c
index 8225756ba..ad503baec 100644
--- a/src/Tk/tkImaging.c
+++ b/src/Tk/tkImaging.c
@@ -363,7 +363,7 @@ load_tkinter_funcs(void) {
     }
 
     free(hMods);
-    if (found_tcl != 1) {
+    if (found_tcl == 0) {
         PyErr_SetString(PyExc_RuntimeError, "Could not find Tcl routines");
     } else if (found_tk == 0) {
         PyErr_SetString(PyExc_RuntimeError, "Could not find Tk routines");