diff --git a/PExpr.cc b/PExpr.cc
index 8a32b0506..e9634511b 100644
--- a/PExpr.cc
+++ b/PExpr.cc
@@ -108,6 +108,16 @@ PEAssignPattern::~PEAssignPattern()
 {
 }
 
+bool PEAssignPattern::has_aa_term(Design*des, NetScope*scope) const
+{
+      bool flag = false;
+      for (const auto *parm : parms_) {
+	    if (parm)
+		  flag = parm->has_aa_term(des, scope) || flag;
+      }
+      return flag;
+}
+
 PEBinary::PEBinary(char op, PExpr*l, PExpr*r)
 : op_(op), left_(l), right_(r)
 {
diff --git a/PExpr.h b/PExpr.h
index 6f6eaf07e..bf8f1e2ef 100644
--- a/PExpr.h
+++ b/PExpr.h
@@ -208,6 +208,8 @@ class PEAssignPattern : public PExpr {
 
       void dump(std::ostream&) const override;
 
+      virtual bool has_aa_term(Design*des, NetScope*scope) const override;
+
       virtual unsigned test_width(Design*des, NetScope*scope, width_mode_t&mode) override;
       virtual NetExpr*elaborate_expr(Design*des, NetScope*scope,
 				     ivl_type_t type, unsigned flags) const override;