diff --git a/builtin.cpp b/builtin.cpp
index 36be7e9b6..98ae9f63e 100644
--- a/builtin.cpp
+++ b/builtin.cpp
@@ -4018,7 +4018,7 @@ static int internal_help(const wchar_t *cmd)
 {
     CHECK(cmd, 0);
     return contains(cmd, L"for", L"while", L"function",
-                    L"if", L"end", L"switch", L"case", L"count");
+                    L"if", L"end", L"switch", L"case", L"count", L"printf");
 }