Avoid ambiguity in gcc 8.2

1 files changed, 1 insertions, 1 deletions

diff --git a/document/src/vespa/document/fieldvalue/stringfieldvalue.cpp b/document/src/vespa/document/fieldvalue/stringfieldvalue.cpp
index d49f6e28a76..d79535d54cd 100644
--- a/document/src/vespa/document/fieldvalue/stringfieldvalue.cpp
+++ b/document/src/vespa/document/fieldvalue/stringfieldvalue.cpp
@@ -109,7 +109,7 @@ FieldValue & StringFieldValue::assign(const FieldValue & rhs)
     if (rhs.inherits(StringFieldValue::classId)) {
         *this = static_cast<const StringFieldValue &>(rhs);
     } else {
-        *this = static_cast<stringref >(rhs.getAsString());
+        *this = rhs.getAsString().operator stringref();
     }
     return *this;
 }