diff --git a/src/common/blkdev.cc b/src/common/blkdev.cc
index 8d524818e89..621e0b9087c 100644
--- a/src/common/blkdev.cc
+++ b/src/common/blkdev.cc
@@ -336,7 +336,7 @@ int get_device_by_uuid(uuid_d dev_uuid, const char* label, char* partition,
   return -EOPNOTSUPP;
 }
 
-void get_dm_parents(const string& dev, set<string> *ls)
+void get_dm_parents(const std::string& dev, std::set<std::string> *ls)
 {
 }
 
@@ -376,7 +376,7 @@ int get_device_by_fd(int fd, char *partition, char *device, size_t max)
   return -EOPNOTSUPP;
 }
 
-void get_dm_parents(const string& dev, set<string> *ls)
+void get_dm_parents(const std::string& dev, std::set<std::string> *ls)
 {
 }
 
@@ -411,7 +411,7 @@ int get_device_by_fd(int fd, char *partition, char *device, size_t max)
 {
   return -EOPNOTSUPP;
 }
-void get_dm_parents(const string& dev, set<string> *ls)
+void get_dm_parents(const std::string& dev, std::set<std::string> *ls)
 {
 }
 #endif