diff --git a/cvpcb/CMakeLists.txt b/cvpcb/CMakeLists.txt
index fba2d99e61..72840f7d1a 100644
--- a/cvpcb/CMakeLists.txt
+++ b/cvpcb/CMakeLists.txt
@@ -118,6 +118,7 @@ target_link_libraries( cvpcb_kiface
     gal
     ${wxWidgets_LIBRARIES}
     ${GDI_PLUS_LIBRARIES}
+    ${OPENMP_LIBRARIES}         # used by 3d viewer
     )
 
 if( BUILD_GITHUB_PLUGIN )