diff --git a/src/iocsh/asTestRegister.c b/src/iocsh/asTestRegister.c
index 174c6c15f..6a6c7b0ab 100644
--- a/src/iocsh/asTestRegister.c
+++ b/src/iocsh/asTestRegister.c
@@ -113,11 +113,6 @@ static void ascarCallFunc(const iocshArgBuf *args)
     ascar(args[0].ival);
 }
 
-static struct iocshVarDef vardefs[] = {
-    {"asCaDebug", iocshArgInt,(void * const )pasCaDebug},
-    {0,iocshArgInt,0}
-};
-
 void epicsShareAPI asTestRegister(void)
 {
     iocshRegister(&asSetFilenameFuncDef,asSetFilenameCallFunc);
@@ -130,5 +125,4 @@ void epicsShareAPI asTestRegister(void)
     iocshRegister(&aspmemFuncDef,aspmemCallFunc);
     iocshRegister(&astacFuncDef,astacCallFunc);
     iocshRegister(&ascarFuncDef,ascarCallFunc);
-    iocshRegisterVariable(vardefs);
 }
diff --git a/src/iocsh/iocsh.h b/src/iocsh/iocsh.h
index 4660b4ba6..e7ac20767 100644
--- a/src/iocsh/iocsh.h
+++ b/src/iocsh/iocsh.h
@@ -43,7 +43,7 @@ typedef union iocshArgBuf {
 typedef struct iocshVarDef {
     const char *name;
     iocshArgType type;
-    void * const pval;
+    void * pval;
 }iocshVarDef;
 
 typedef struct iocshArg {