diff --git a/python-httpx.spec b/python-httpx.spec
index 867a918..41c041b 100644
--- a/python-httpx.spec
+++ b/python-httpx.spec
@@ -69,6 +69,7 @@ BuildRequires:  %{python_module trio}
 BuildRequires:  %{python_module trustme}
 # uvicorn 0.18 fixed an issue in the test suite where http-headers wer not all lowercase as expected
 BuildRequires:  %{python_module uvicorn >= 0.18}
+BuildRequires:  %{python_module zstandard}
 %endif
 # /SECTION
 %python_subpackages