diff --git a/src/iocsh/systemCommandRegister.c b/src/iocsh/systemCommandRegister.c
index 222d934c2..c7016ed77 100644
--- a/src/iocsh/systemCommandRegister.c
+++ b/src/iocsh/systemCommandRegister.c
@@ -16,9 +16,11 @@
  */
 #include <stdlib.h>
 #include <errlog.h>
-#include <iocsh.h>
 #include <epicsExport.h>
 
+#define epicsExportSharedSymbols
+#include <iocsh.h>
+
 /* system */
 static const iocshArg systemArg0 = { "command string",iocshArgString};
 static const iocshArg * const systemArgs[1] = {&systemArg0};