diff --git a/IO_EXIOExpander.h b/IO_EXIOExpander.h
index ca67319..5e7a1e9 100644
--- a/IO_EXIOExpander.h
+++ b/IO_EXIOExpander.h
@@ -105,8 +105,8 @@ private:
             if (_digitalPinBytes < digitalBytesNeeded) {
               // Not enough space, free any existing buffer and allocate a new one
               if (_digitalPinBytes > 0) free(_digitalInputStates);
-              _digitalInputStates = (byte*) calloc(_digitalPinBytes, 1);
               _digitalPinBytes = digitalBytesNeeded;
+              _digitalInputStates = (byte*) calloc(_digitalPinBytes, 1);
             }
           }