diff --git a/src/tests/wayland-test-clients/fractional-scale.c b/src/tests/wayland-test-clients/fractional-scale.c
index b46e63f31..4ed55ebe3 100644
--- a/src/tests/wayland-test-clients/fractional-scale.c
+++ b/src/tests/wayland-test-clients/fractional-scale.c
@@ -18,6 +18,7 @@
 #include "config.h"
 
 #include <glib.h>
+#include <math.h>
 #include <wayland-client.h>
 
 #include "wayland-test-client-utils.h"
diff --git a/src/tests/wayland-test-clients/meson.build b/src/tests/wayland-test-clients/meson.build
index e61781ba2..eafda40e4 100644
--- a/src/tests/wayland-test-clients/meson.build
+++ b/src/tests/wayland-test-clients/meson.build
@@ -80,6 +80,7 @@ foreach test : wayland_test_clients
     glib_dep,
     gobject_dep,
     wayland_client_dep,
+    m_dep,
   ]
   if test.has_key('extra_deps')
     deps += test['extra_deps']