1 files changed, 3 insertions, 0 deletions
diff --git a/proc.c b/proc.c
index 850de22634..29a857f4a4 100644
--- a/proc.c
+++ b/proc.c
@@ -820,6 +820,9 @@ passed_block(VALUE pass_procval)
 {
     if (!NIL_P(pass_procval)) {
 	rb_proc_t *pass_proc;
+	if (SYMBOL_P(pass_procval)) {
+	    pass_procval = sym_proc_new(rb_cProc, pass_procval);
+	}
 	GetProcPtr(pass_procval, pass_proc);
 	return &pass_proc->block;
     }