diff --git a/lib/strtoofft.h b/lib/strtoofft.h
index 3bea048e64436dda9a7a4c950195608a5b66dd10..6c1d944e10b665eee0eff385fc77e1d65043af1b 100644
--- a/lib/strtoofft.h
+++ b/lib/strtoofft.h
@@ -51,6 +51,7 @@
 #    else
        curl_off_t curlx_strtoll(const char *nptr, char **endptr, int base);
 #      define curlx_strtoofft curlx_strtoll
+#      define NEED_CURL_STRTOLL 1
 #    endif
 #  endif
 #else