diff --git a/src/OpenMesh/Core/IO/SR_binary_spec.hh b/src/OpenMesh/Core/IO/SR_binary_spec.hh
index c9f37b72..725ce727 100644
--- a/src/OpenMesh/Core/IO/SR_binary_spec.hh
+++ b/src/OpenMesh/Core/IO/SR_binary_spec.hh
@@ -207,6 +207,7 @@ VECTORTS_BINARY( 1 )
 VECTORTS_BINARY( 2 )
 VECTORTS_BINARY( 3 )
 VECTORTS_BINARY( 4 )
+VECTORTS_BINARY( 5 )
 VECTORTS_BINARY( 6 )
 
 #undef VECTORTS_BINARY