diff --git a/src/libsysprof-ui/sysprof-profiler-assistant.ui b/src/libsysprof-ui/sysprof-profiler-assistant.ui
index acdb1735..88167f6c 100644
--- a/src/libsysprof-ui/sysprof-profiler-assistant.ui
+++ b/src/libsysprof-ui/sysprof-profiler-assistant.ui
@@ -32,7 +32,7 @@
     <property name="icon-name">sysprof-gtk</property>
     <child>
       <object class="SysprofPreloadSource">
-        <property name="preload">libsysprof-speedtrack-3.so</property>
+        <property name="preload">libsysprof-speedtrack-4.so</property>
       </object>
     </child>
   </object>