Issue #15020: The program name used to search for Python's path is now "python3" under Unix, not "python".
diff --git a/Misc/NEWS b/Misc/NEWS
index 5adf15e..563a7f0 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
 Core and Builtins
 -----------------
 
+- Issue #15020: The program name used to search for Python's path is now
+  "python3" under Unix, not "python".
+
 - Issue #15033: Fix the exit status bug when modules invoked using -m swith,
   return the proper failure return value (1). Patch contributed by Jeff Knupp.
 
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 5a96bae..4609468 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -696,7 +696,11 @@
     PyInterpreterState_Delete(interp);
 }
 
+#ifdef MS_WINDOWS
 static wchar_t *progname = L"python";
+#else
+static wchar_t *progname = L"python3";
+#endif
 
 void
 Py_SetProgramName(wchar_t *pn)