diff --git a/src/engine/meson.build b/src/engine/meson.build
index 0e43860a..c9b049c9 100644
--- a/src/engine/meson.build
+++ b/src/engine/meson.build
@@ -327,6 +327,7 @@ geary_engine_sources = [
 ]
 
 geary_engine_dependencies = [
+  libmath,
   gee,
   gio,
   glib,