diff --git a/src/bin/initdb/initdb.c b/src/bin/initdb/initdb.c
index 2ef179165b..70273be783 100644
--- a/src/bin/initdb/initdb.c
+++ b/src/bin/initdb/initdb.c
@@ -2497,7 +2497,7 @@ setup_bin_paths(const char *argv0)
 			pg_log_error("The program \"postgres\" is needed by %s but was not found in the\n"
 						 "same directory as \"%s\".\n"
 						 "Check your installation.",
-						 full_path, progname);
+						 progname, full_path);
 		else
 			pg_log_error("The program \"postgres\" was found by \"%s\"\n"
 						 "but was not the same version as %s.\n"