diff --git a/python/obitools3/parsers/fasta.pyx b/python/obitools3/parsers/fasta.pyx
index 2a262bc..44be6b9 100644
--- a/python/obitools3/parsers/fasta.pyx
+++ b/python/obitools3/parsers/fasta.pyx
@@ -28,9 +28,14 @@ def fastaIterator(lineiterator, int buffersize=100000000):
         ident,tags,definition = parseHeader(line)
         s = []
         line = next(i)
-        while line[0]!='>':
-            s.append(line[0:-1])
-            line = next(i)
+        
+        try:
+            while line[0]!='>':
+                s.append(line[0:-1])
+                line = next(i)
+        except StopIteration:
+            pass
+        
         sequence  = "".join(s)
         quality   = None
 
@@ -42,5 +47,6 @@ def fastaIterator(lineiterator, int buffersize=100000000):
                 "annotation" : {}
               }
         
+    
         
         
\ No newline at end of file