diff --git a/srcpkgs/gnuradio/template b/srcpkgs/gnuradio/template
index f9d50825b18..66eb0e62629 100644
--- a/srcpkgs/gnuradio/template
+++ b/srcpkgs/gnuradio/template
@@ -27,7 +27,7 @@ python_version=3
 
 if [ "$CROSS_BUILD" ]; then
 	# CMake fails when cross-compiling.
-	configure_args+=" -DENABLE_TESTING=OFF"
+	configure_args+=" -DENABLE_TESTING=OFF -DPYBIND11_USE_CROSSCOMPILING=ON"
 fi
 
 if [ "${XBPS_TARGET_MACHINE%-musl}" = "i686" ]; then