diff --git a/interface/CMakeLists.txt b/interface/CMakeLists.txt
index 59c35598d7a14e225c75952ce619863348a8b74a..0c47b575be2866337362dffefeb5724d3c3951e5 100644
--- a/interface/CMakeLists.txt
+++ b/interface/CMakeLists.txt
@@ -4,4 +4,4 @@
 
 set(ROBOTAPI_INTERFACE_DEPEND ArmarXCore)
 # generate the interface library
-armarx_interfaces_generate_library(RobotAPI 0.1.0 0 ${ROBOTAPI_INTERFACE_DEPEND})
+armarx_interfaces_generate_library(RobotAPI 0.1.0 0 "${ROBOTAPI_INTERFACE_DEPEND}")