diff --git a/pyopencl/reduction.py b/pyopencl/reduction.py
index ebde742dcc9bd1f72376a0709aaabf30e6910e62..11d2e4102f427f3ec105e8bc0796d013b12d13f5 100644
--- a/pyopencl/reduction.py
+++ b/pyopencl/reduction.py
@@ -168,7 +168,7 @@ def  get_reduction_source(
         try:
             return device.warp_size_nv
         except:
-            if "nvidida" in device.vendor.lower():
+            if "nvidia" in device.vendor.lower():
                 from warnings import warn
                 warn("Reduction might be unnecessarily slow: "
                         "can't query warp size on Nvidia device")