diff --git a/contrib/h3-cmake/CMakeLists.txt b/contrib/h3-cmake/CMakeLists.txt
index 80e76311f70..2911d7283f0 100644
--- a/contrib/h3-cmake/CMakeLists.txt
+++ b/contrib/h3-cmake/CMakeLists.txt
@@ -16,6 +16,7 @@ ${H3_SOURCE_DIR}/lib/mathExtensions.c
 ${H3_SOURCE_DIR}/lib/polygon.c
 ${H3_SOURCE_DIR}/lib/vec2d.c
 ${H3_SOURCE_DIR}/lib/vec3d.c
+${H3_SOURCE_DIR}/lib/vertex.c
 ${H3_SOURCE_DIR}/lib/vertexGraph.c
 )