diff --git a/flopy/modpath/mp7particledata.py b/flopy/modpath/mp7particledata.py
index 7ee9a0ab8..0462b5ff6 100644
--- a/flopy/modpath/mp7particledata.py
+++ b/flopy/modpath/mp7particledata.py
@@ -173,7 +173,7 @@ def __init__(
             partlocs = np.array(partlocs, dtype=dtype)
         elif isinstance(partlocs, np.ndarray):
             dtypein = partlocs.dtype
-            if dtypein != partlocs.dtype:
+            if dtypein != dtype:
                 partlocs = np.array(partlocs, dtype=dtype)
         else:
             msg = (