diff --git a/olefile/olefile.py b/olefile/olefile.py
index 7cf59f4..ddbc320 100644
--- a/olefile/olefile.py
+++ b/olefile/olefile.py
@@ -2172,6 +2172,9 @@ def getproperties(self, filename, convert_time=False, no_conversion=None):
         num_props = min(num_props, int(len(s) / 8))
         for i in iterrange(num_props):
             property_id = 0 # just in case of an exception
+            if 8+i*8 > len(s):
+                break
+
             try:
                 property_id = i32(s, 8+i*8)
                 offset = i32(s, 12+i*8)