diff --git a/cmds/idmap2/idmap2/Lookup.cpp b/cmds/idmap2/idmap2/Lookup.cpp
index 8323d0b..437180d 100644
--- a/cmds/idmap2/idmap2/Lookup.cpp
+++ b/cmds/idmap2/idmap2/Lookup.cpp
@@ -71,7 +71,7 @@
   }
 
   // next, try to parse as a package:type/name string
-  if (auto resid = am.GetResourceId(res, "", fallback_package)) {
+  if (auto resid = am.GetResourceId(res, "", fallback_package); resid.ok()) {
     return *resid;
   }
 
@@ -94,7 +94,7 @@
     case Res_value::TYPE_STRING: {
       const ResStringPool* pool = am->GetStringPoolForCookie(value.cookie);
       out->append("\"");
-      if (auto str = pool->string8ObjectAt(value.data)) {
+      if (auto str = pool->string8ObjectAt(value.data); str.ok()) {
         out->append(*str);
       }
     } break;
diff --git a/cmds/idmap2/libidmap2/XmlParser.cpp b/cmds/idmap2/libidmap2/XmlParser.cpp
index 7c55b64..4030b83 100644
--- a/cmds/idmap2/libidmap2/XmlParser.cpp
+++ b/cmds/idmap2/libidmap2/XmlParser.cpp
@@ -98,7 +98,7 @@
 
   switch ((*value).dataType) {
     case Res_value::TYPE_STRING: {
-      if (auto str = parser_.getStrings().string8ObjectAt((*value).data)) {
+      if (auto str = parser_.getStrings().string8ObjectAt((*value).data); str.ok()) {
         return std::string(str->string());
       }
       break;