diff --git a/src/qml/parser/qqmljs.g b/src/qml/parser/qqmljs.g
index 667bcd1801..d2d947e55c 100644
--- a/src/qml/parser/qqmljs.g
+++ b/src/qml/parser/qqmljs.g
@@ -451,6 +451,7 @@ Parser::Parser(Engine *engine):
     location_stack(0),
     string_stack(0),
     program(0),
+    yylval(0),
     first_token(0),
     last_token(0)
 {
diff --git a/src/qml/parser/qqmljsparser.cpp b/src/qml/parser/qqmljsparser.cpp
index 718ff4d09a..df16a24bcc 100644
--- a/src/qml/parser/qqmljsparser.cpp
+++ b/src/qml/parser/qqmljsparser.cpp
@@ -92,6 +92,7 @@ Parser::Parser(Engine *engine):
     location_stack(0),
     string_stack(0),
     program(0),
+    yylval(0),
     first_token(0),
     last_token(0)
 {