diff --git a/Bio/Motif/Parsers/MEME.py b/Bio/Motif/Parsers/MEME.py
index a12eae6e5cf..1033124df33 100644
--- a/Bio/Motif/Parsers/MEME.py
+++ b/Bio/Motif/Parsers/MEME.py
@@ -92,6 +92,8 @@ def add_instance_from_values (self, name = 'default', pvalue = 1, sequence = 'AT
         inst._strand(strand)
         if self.length:
             inst._length(self.length)
+        else:
+            inst._length(len(sequence))
         if self.name:
             inst._motifname(self.name)
         self.add_instance(inst)