diff --git a/src/vim9execute.c b/src/vim9execute.c
index 4271f38..fda44ec 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -487,10 +487,10 @@
     int		error;
     int		idx;
 
-    if (ufunc->uf_dfunc_idx == UF_TO_BE_COMPILED
+    if (ufunc->uf_def_status == UF_TO_BE_COMPILED
 	    && compile_def_function(ufunc, FALSE, NULL) == FAIL)
 	return FAIL;
-    if (ufunc->uf_dfunc_idx >= 0)
+    if (ufunc->uf_def_status == UF_COMPILED)
     {
 	// The function has been compiled, can call it quickly.  For a function
 	// that was defined later: we can call it directly next time.
@@ -671,8 +671,8 @@
 // Like STACK_TV_VAR but use the outer scope
 #define STACK_OUT_TV_VAR(idx) (((typval_T *)ectx.ec_outer_stack->ga_data) + ectx.ec_outer_frame + STACK_FRAME_SIZE + idx)
 
-    if (ufunc->uf_dfunc_idx == UF_NOT_COMPILED
-	    || (ufunc->uf_dfunc_idx == UF_TO_BE_COMPILED
+    if (ufunc->uf_def_status == UF_NOT_COMPILED
+	    || (ufunc->uf_def_status == UF_TO_BE_COMPILED
 			  && compile_def_function(ufunc, FALSE, NULL) == FAIL))
     {
 	if (called_emsg == called_emsg_before)
@@ -2379,10 +2379,10 @@
 	semsg(_("E1061: Cannot find function %s"), eap->arg);
 	return;
     }
-    if (ufunc->uf_dfunc_idx == UF_TO_BE_COMPILED
+    if (ufunc->uf_def_status == UF_TO_BE_COMPILED
 	    && compile_def_function(ufunc, FALSE, NULL) == FAIL)
 	return;
-    if (ufunc->uf_dfunc_idx < 0)
+    if (ufunc->uf_def_status != UF_COMPILED)
     {
 	semsg(_("E1062: Function %s is not compiled"), eap->arg);
 	return;