diff --git a/src/runtime/extern.go b/src/runtime/extern.go
index 8fb8720e89..531c07cf3d 100644
--- a/src/runtime/extern.go
+++ b/src/runtime/extern.go
@@ -79,7 +79,7 @@ It is a comma-separated list of name=val pairs setting these named variables:
 	error at each collection, summarizing the amount of memory collected and the
 	length of the pause. The format of this line is subject to change.
 	Currently, it is:
-		gc # @#s #%: #+#+# ms clock, #+#/#/#+# ms cpu, #->#-># MB, # MB goal, # P
+		gc # @#s #%: #+#+# ms clock, #+#/#/#+# ms cpu, #->#-># MB, # MB goal, # MB stacks, #MB globals, # P
 	where the fields are as follows:
 		gc #         the GC number, incremented at each GC
 		@#s          time in seconds since program start
diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go
index 1db0984906..3361d48abd 100644
--- a/src/runtime/mgc.go
+++ b/src/runtime/mgc.go
@@ -1120,7 +1120,7 @@ func gcMarkTermination() {
 		print(" ms cpu, ",
 			work.heap0>>20, "->", work.heap1>>20, "->", work.heap2>>20, " MB, ",
 			gcController.lastHeapGoal>>20, " MB goal, ",
-			gcController.maxStackScan.Load()>>20, " MB stacks, ",
+			gcController.lastStackScan.Load()>>20, " MB stacks, ",
 			gcController.globalsScan.Load()>>20, " MB globals, ",
 			work.maxprocs, " P")
 		if work.userForced {