diff --git a/src/utils.jl b/src/utils.jl
index 7eea4358c..75dd62110 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -178,7 +178,7 @@ function validate_inputs(x, y)
     if dim(x) != dim(y) # Passes by default if `dim` is not defined
         throw(
             DimensionMismatch(
-                "Dimensionality of x ($(dim(x))) not equality to that of y ($(dim(y)))"
+                "dimensionality of x ($(dim(x))) is not equal to that of y ($(dim(y)))"
             ),
         )
     end