diff --git a/completions/patch b/completions/patch
index bba184ceb4a..92bbb90594e 100644
--- a/completions/patch
+++ b/completions/patch
@@ -50,7 +50,7 @@ _comp_cmd_patch()
     [[ $was_split ]] && return
 
     if [[ $cur == -* ]]; then
-        _comp_compgen_help
+        _comp_compgen_help || _comp_compgen_usage
         [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
         return
     fi
diff --git a/completions/truncate b/completions/truncate
index 94534a285bc..28040e830fc 100644
--- a/completions/truncate
+++ b/completions/truncate
@@ -20,7 +20,7 @@ _comp_cmd_truncate()
     [[ $was_split ]] && return
 
     if [[ $cur == -* ]]; then
-        _comp_compgen_help
+        _comp_compgen_help || _comp_compgen_usage
         [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
         return
     fi