diff --git a/sinqhm/SinqHM_bootParamsConfig.c b/sinqhm/SinqHM_bootParamsConfig.c
index 779a21a4..525e49a6 100755
--- a/sinqhm/SinqHM_bootParamsConfig.c
+++ b/sinqhm/SinqHM_bootParamsConfig.c
@@ -860,7 +860,10 @@
     int		ndetM, ndetO, ndetU, c_port, s_port;
     int		status;
     char	tsknam[32];
-
+#ifndef FOCUS
+    printf ("\n\"/sp=focus\" is only permitted on the FOCUS instrument!\n");
+    return False;
+#else
     void FOCUS_main (void);	/* Define template for FOCUS_main */
 
     hostM = (p_arg1 != NULL) ? p_arg1 : "localhost";
@@ -963,6 +966,7 @@
     }
     taskDelay (1 * sysClkRateGet ());	/* Give FOCUS_main time to get going */
     return True;
+#endif
   }
 /*
 **--------------------------------------------------------------------------*/