diff --git a/src/_tkagg.cpp b/src/_tkagg.cpp
index bbca8e8d066c..663c06fd0474 100644
--- a/src/_tkagg.cpp
+++ b/src/_tkagg.cpp
@@ -231,13 +231,13 @@ bool load_tcl_tk(T lib)
{
// Try to fill Tcl/Tk global vars with function pointers. Return whether
// all of them have been filled.
- if (void* ptr = dlsym(lib, "Tcl_SetVar")) {
+ if (auto ptr = dlsym(lib, "Tcl_SetVar")) {
TCL_SETVAR = (Tcl_SetVar_t)ptr;
}
- if (void* ptr = dlsym(lib, "Tk_FindPhoto")) {
+ if (auto ptr = dlsym(lib, "Tk_FindPhoto")) {
TK_FIND_PHOTO = (Tk_FindPhoto_t)ptr;
}
- if (void* ptr = dlsym(lib, "Tk_PhotoPutBlock")) {
+ if (auto ptr = dlsym(lib, "Tk_PhotoPutBlock")) {
TK_PHOTO_PUT_BLOCK = (Tk_PhotoPutBlock_t)ptr;
}
return TCL_SETVAR && TK_FIND_PHOTO && TK_PHOTO_PUT_BLOCK;
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