diff --git a/src/mceditlib/operations/analyze.py b/src/mceditlib/operations/analyze.py
index f91e455..f12d310 100644
--- a/src/mceditlib/operations/analyze.py
+++ b/src/mceditlib/operations/analyze.py
@@ -26,7 +26,7 @@ class AnalyzeOperation(Operation):
         super(AnalyzeOperation, self).__init__(dimension, selection)
 
         self.createSections = False
-        self.blocks = numpy.zeros(65536, dtype='uintp')
+        self.blocks = numpy.zeros(65536, dtype='intp')
         self.selection = selection
         self.entityCounts = defaultdict(int)
         self.tileEntityCounts = defaultdict(int)