diff --git a/interp/interp.go b/interp/interp.go
index c0d4b21b..4ae48705 100644
--- a/interp/interp.go
+++ b/interp/interp.go
@@ -208,7 +208,7 @@ type Panic struct {
 }
 
 // TODO: Capture interpreter stack frames also and remove
-// fmt.Println(n.cfgErrorf("panic")) in runCfg.
+// fmt.Fprintln(n.interp.stderr, oNode.cfgErrorf("panic")) in runCfg.
 
 func (e Panic) Error() string { return fmt.Sprint(e.Value) }
 
diff --git a/interp/run.go b/interp/run.go
index f3ad19c5..48d3cb04 100644
--- a/interp/run.go
+++ b/interp/run.go
@@ -180,7 +180,7 @@ func runCfg(n *node, f *frame) {
 			if oNode == nil {
 				oNode = n
 			}
-			fmt.Println(oNode.cfgErrorf("panic"))
+			fmt.Fprintln(n.interp.stderr, oNode.cfgErrorf("panic"))
 			f.mutex.Unlock()
 			panic(f.recovered)
 		}