diff --git a/cli_flags.go b/cli_flags.go
index 814a19a5..6eee5bc3 100644
--- a/cli_flags.go
+++ b/cli_flags.go
@@ -68,7 +68,7 @@ var (
 		"Valid values are in the range [1..%d], and 0 to disable off-cpu profiling."+
 		"Default is %d.",
 		support.OffCPUThresholdMax, defaultOffCPUThreshold)
-	envVarsHelp = "Comma separated list of environment variables that should be reported with the captured profiling samples"
+	envVarsHelp = "Comma separated list of environment variables that should be reported with the captured profiling samples."
 )
 
 // Package-scope variable, so that conditionally compiled other components can refer