diff --git a/src/node_options.cc b/src/node_options.cc
index a37645d1b79b38..bd4ad2f6408ca8 100644
--- a/src/node_options.cc
+++ b/src/node_options.cc
@@ -757,7 +757,7 @@ PerProcessOptionsParser::PerProcessOptionsParser(
             kAllowedInEnvironment);
   AddOption("--build-snapshot",
             "Generate a snapshot blob when the process exits."
-            "Currently only supported in the node_mksnapshot binary.",
+            " Currently only supported in the node_mksnapshot binary.",
             &PerProcessOptions::build_snapshot,
             kDisallowedInEnvironment);
   AddOption("--node-snapshot",