diff --git a/src/lib.c b/src/lib.c
index 4f6d27066..f4862bc78 100644
--- a/src/lib.c
+++ b/src/lib.c
@@ -493,6 +493,13 @@ static struct lib_unit *lib_get_aux(lib_t lib, ident_t ident)
 {
    assert(lib != NULL);
 
+   // Handle aliased library names
+   ident_t lname = ident_until(ident, '.');
+   if (lname != lib->name) {
+      ident_t uname = ident_rfrom(ident, '.');
+      ident = ident_prefix(lib->name, uname, '.');
+   }
+
    // Search in the list of already loaded units
    for (unsigned n = 0; n < lib->n_units; n++) {
       if (tree_ident(lib->units[n].top) == ident)
diff --git a/src/sem.c b/src/sem.c
index 0112b661c..30f3ba12e 100644
--- a/src/sem.c
+++ b/src/sem.c
@@ -1215,12 +1215,6 @@ static bool sem_check_use_clause(tree_t c)
 
    lib_t lib = lib_find(istr(lname), true, true);
    if (lib != NULL) {
-      if (lname != lib_name(lib)) {
-         ident_t unit = ident_rfrom(cname, '.');
-         lname = lib_name(lib);
-         cname = ident_prefix(lname, unit, '.');
-      }
-
       if (lname == cname) {
          assert(all);