diff --git a/src/pkg/runtime/proc.c b/src/pkg/runtime/proc.c
index 60cf02022b..b4bc72b5b7 100644
--- a/src/pkg/runtime/proc.c
+++ b/src/pkg/runtime/proc.c
@@ -947,7 +947,7 @@ mspinning(void)
 }
 
 // Schedules some M to run the p (creates an M if necessary).
-// If p==nil, tries to get an idle P, if no idle P's returns false.
+// If p==nil, tries to get an idle P, if no idle P's does nothing.
 static void
 startm(P *p, bool spinning)
 {