diff --git a/core/product_config.rbc b/core/product_config.rbc
index 469b0f75ee..8f27c998d7 100644
--- a/core/product_config.rbc
+++ b/core/product_config.rbc
@@ -479,8 +479,8 @@ def _file_wildcard_exists(file_pattern):
 
 def _find_and_copy(pattern, from_dir, to_dir):
     """Return a copy list for the files matching the pattern."""
-    return sorted(["%s/%s:%s/%s" % (
-        from_dir, f, to_dir, f) for f in rblf_find_files(from_dir, pattern, only_files=1)])
+    return sorted([("%s/%s:%s/%s" % (from_dir, f, to_dir, f))
+        .replace("//", "/") for f in rblf_find_files(from_dir, pattern, only_files=1)])
 
 def _findstring(needle, haystack):
     """Equivalent to GNU make's $(findstring)."""