diff --git a/src/pkg/debug/dwarf/const.go b/src/pkg/debug/dwarf/const.go
index 918b153d078..ad696dc3269 100644
--- a/src/pkg/debug/dwarf/const.go
+++ b/src/pkg/debug/dwarf/const.go
@@ -207,6 +207,7 @@ const (
 	formRef8        format = 0x14
 	formRefUdata    format = 0x15
 	formIndirect    format = 0x16
+	formFlagPresent format = 0x19
 )
 
 // A Tag is the classification (the type) of an Entry.
diff --git a/src/pkg/debug/dwarf/entry.go b/src/pkg/debug/dwarf/entry.go
index 2885d8fa26c..f376e40880b 100644
--- a/src/pkg/debug/dwarf/entry.go
+++ b/src/pkg/debug/dwarf/entry.go
@@ -185,6 +185,10 @@ func (b *buf) entry(atab abbrevTable, ubase Offset) *Entry {
 		// flag
 		case formFlag:
 			val = b.uint8() == 1
+		case formFlagPresent:
+			// The attribute is implicitly indicated as present, and no value is
+			// encoded in the debugging information entry itself.
+			val = true
 
 		// reference to other entry
 		case formRefAddr: