diff --git a/src/pki/command.c b/src/pki/command.c
index 5c765ba92..42fc86629 100644
--- a/src/pki/command.c
+++ b/src/pki/command.c
@@ -57,7 +57,7 @@ static options_t *options;
 /**
  * Global options used by all subcommands
  */
-static struct option command_opts[MAX_COMMANDS > MAX_OPTIONS ? MAX_COMMANDS : MAX_OPTIONS];
+static struct option command_opts[(MAX_COMMANDS > MAX_OPTIONS ? MAX_COMMANDS : MAX_OPTIONS) + 1];
 
 /**
  * Global optstring used by all subcommands