diff --git a/docs/src/dev/extensions.rst b/docs/src/dev/extensions.rst
index 36f44a4bb..9482be725 100644
--- a/docs/src/dev/extensions.rst
+++ b/docs/src/dev/extensions.rst
@@ -131,7 +131,7 @@ back and go to our example to give ourselves a more concrete image.
         * A primitive must know how to evaluate itself on the CPU/GPU
         * for the given inputs and populate the output array.
         *
-        * To avoid unecessary allocations, the evaluation function
+        * To avoid unnecessary allocations, the evaluation function
         * is responsible for allocating space for the array.
         */
         void eval_cpu(const std::vector<array>& inputs, array& out) override;
@@ -945,4 +945,4 @@ Scripts
 .. _Metal-cpp: https://developer.apple.com/metal/cpp/
 .. _`Metal Specification`: https://developer.apple.com/metal/Metal-Shading-Language-Specification.pdf
 .. _`Metal Example`: https://developer.apple.com/documentation/metal/performing_calculations_on_a_gpu?language=objc
-.. _PyBind11: https://pybind11.readthedocs.io/en/stable/
\ No newline at end of file
+.. _PyBind11: https://pybind11.readthedocs.io/en/stable/