diff --git a/pyopencl/__init__.py b/pyopencl/__init__.py
index 70c5640946fbfcf1f0f25a02bb881e9bbec20d12..57781304792b71f1189637fcbd242b2c1c2e4515 100644
--- a/pyopencl/__init__.py
+++ b/pyopencl/__init__.py
@@ -894,7 +894,7 @@ def image_from_array(ctx, ary, num_channels=None, mode="r", norm_int=False):
             dtype, num_channels = vec.type_to_scalar_and_count[dtype]
         except KeyError:
             # It must be a scalar type then.
-            pass
+            num_channels = 1
 
         shape = ary.shape
         strides = ary.strides