diff --git a/RTCP/Cobalt/GPUProc/src/scripts/Cobalt_install.sh b/RTCP/Cobalt/GPUProc/src/scripts/Cobalt_install.sh
index 72a23f0fd3733b6e5c11607ac1a99ad905be57d8..221e0acf262c543e701fed321dc7d3f55a1f9899 100755
--- a/RTCP/Cobalt/GPUProc/src/scripts/Cobalt_install.sh
+++ b/RTCP/Cobalt/GPUProc/src/scripts/Cobalt_install.sh
@@ -47,8 +47,8 @@ ln -sfT ~lofarsys/lofar-userdata/parset-overrides etc/parset-additions.d/overrid
 # cap_ipc_lock: allow app to lock in memory (prevent swap)
 # cap_net_raw:  allow binding sockets to NICs
 OUTPUTPROC_CAPABILITIES='cap_sys_nice,cap_ipc_lock'
-sudo /sbin/setcap "\${OUTPUTPROC_CAPABILITIES}"=ep bin/outputProc || true
-sudo /sbin/setcap "\${OUTPUTPROC_CAPABILITIES}"=ep bin/TBB_Writer || true
+sudo /sbin/setcap "${OUTPUTPROC_CAPABILITIES}"=ep bin/outputProc || true
+sudo /sbin/setcap "${OUTPUTPROC_CAPABILITIES}"=ep bin/TBB_Writer || true
 RTCP_CAPABILITIES='cap_net_raw,cap_sys_nice,cap_ipc_lock'
-sudo /sbin/setcap "\${RTCP_CAPABILITIES}"=ep bin/rtcp
+sudo /sbin/setcap "${RTCP_CAPABILITIES}"=ep bin/rtcp