diff --git a/lingucomponent/Library_MacOSXSpell.mk b/lingucomponent/Library_MacOSXSpell.mk
index 3c80418e657b..a8529b6f86be 100644
--- a/lingucomponent/Library_MacOSXSpell.mk
+++ b/lingucomponent/Library_MacOSXSpell.mk
@@ -53,6 +53,7 @@ $(eval $(call gb_Library_use_system_darwin_frameworks,MacOSXSpell,\
 ))
 
 $(eval $(call gb_Library_use_externals,MacOSXSpell,\
+	boost_headers \
 	hunspell \
 ))