diff --git a/3d-viewer/CMakeLists.txt b/3d-viewer/CMakeLists.txt
index b48e505d67..47014f6588 100644
--- a/3d-viewer/CMakeLists.txt
+++ b/3d-viewer/CMakeLists.txt
@@ -6,6 +6,7 @@ include_directories(
     ../pcbnew
     ../polygon
     ${GLEW_INCLUDE_DIR}
+    ${GLM_INCLUDE_DIR}
     ${INC_AFTER}
     )