diff --git a/src/constants.F90 b/src/constants.F90
index 05327153d0..9091460148 100644
--- a/src/constants.F90
+++ b/src/constants.F90
@@ -11,7 +11,7 @@ module constants
   integer, parameter :: VERSION_RELEASE = 3
 
   ! Revision numbers for binary files
-  integer, parameter :: REVISION_STATEPOINT       = 10
+  integer, parameter :: REVISION_STATEPOINT       = 11
   integer, parameter :: REVISION_PARTICLE_RESTART = 1
 
   ! Binary file types
diff --git a/src/utils/statepoint.py b/src/utils/statepoint.py
index 430abee8b8..0bfb66716b 100644
--- a/src/utils/statepoint.py
+++ b/src/utils/statepoint.py
@@ -151,7 +151,7 @@ class StatePoint(object):
 
         # Read statepoint revision
         self.revision = self._get_int(path='revision')[0]
-        if self.revision != 10:
+        if self.revision != 11:
           raise Exception('Statepoint Revision is not consistent.')
 
         # Read OpenMC version
@@ -342,6 +342,12 @@ class StatePoint(object):
         if not self._results:
             self.read_results()
 
+        # Source bank present
+        source_present = self._get_int(path='source_present')[0]
+        if source_present != 1:
+            print('Source bank not present.')
+            return
+
         # For HDF5 state points, copy entire bank
         if self._hdf5:
             source_sites = self._f['source_bank'].value