diff --git a/openfast_toolbox/io/rosco_discon_file.py b/openfast_toolbox/io/rosco_discon_file.py
index b4de969..b7f2891 100644
--- a/openfast_toolbox/io/rosco_discon_file.py
+++ b/openfast_toolbox/io/rosco_discon_file.py
@@ -136,6 +136,7 @@ def toString(self):
                 FMTs['{:<4.4f}']=['WE_FOPoles_v']
                 FMTs['{:<10.8f}']=['WE_FOPoles']
                 FMTs['{:<10.3f}']=['PS_BldPitchMin']
+                FMTs['{:<7.0f}']=['PerfTableSize']
                 fmtFloat='{:<014.5f}'
                 for fmt,keys in FMTs.items():
                     if param in keys: