diff --git a/src/common/db_alias.cpp b/src/common/db_alias.cpp
index 3c7d680cf6..abf4de2acf 100644
--- a/src/common/db_alias.cpp
+++ b/src/common/db_alias.cpp
@@ -336,6 +336,7 @@ namespace
 				}
 
 				PathName correctedAlias(par->name.ToPathName());
+				replace_dir_sep(correctedAlias);
 				AliasName* alias = aliasHash.lookup(correctedAlias);
 				if (alias)
 				{