diff --git a/deluge/common.py b/deluge/common.py
index 400f0ec98..276e86a2d 100644
--- a/deluge/common.py
+++ b/deluge/common.py
@@ -612,7 +612,11 @@ def get_magnet_info(uri):
             if param.startswith(xt_param):
                 xt_hash = param[len(xt_param):]
                 if len(xt_hash) == 32:
-                    info_hash = base64.b32decode(xt_hash).encode("hex")
+                    try:
+                        info_hash = base64.b32decode(xt_hash.upper()).encode("hex")
+                    except TypeError as ex:
+                        log.debug("Invalid base32 magnet hash: %s, %s", xt_hash, ex)
+                        break
                 elif len(xt_hash) == 40:
                     info_hash = xt_hash
                 else: