diff --git a/node.go b/node.go
index 415647f..95aee10 100644
--- a/node.go
+++ b/node.go
@@ -590,6 +590,28 @@ func (this *conversionState) convertNoFreeFloating(n_ node.Node) (string, error)
 				ret += "this." + this.currentClassParentName + " = *super // copy by value\n"
 				return ret, nil
 			}
+
+			if fnname, err := this.resolveName(fncall.Function); err == nil && fnname == "define" {
+				// define() gets converted to const
+
+				if len(fncall.ArgumentList.Arguments) != 2 {
+					return "", parseErr{fncall, fmt.Errorf("expected define() to have 2 arguments, found %d", len(fncall.ArgumentList.Arguments))}
+				}
+
+				defineName := fncall.ArgumentList.Arguments[0].(*node.Argument).Expr // that much is always possible
+				defineNameStr, ok := defineName.(*scalar.String)
+				if !ok {
+					return "", parseErr{fncall, fmt.Errorf("can't handle a complex expression in define() name")}
+				}
+
+				rawDefineName, err := phpUnquote(defineNameStr.Value)
+				if err != nil {
+					return "", parseErr{fncall, err}
+				}
+
+				// Convert to a final Const statement
+				return this.convert(stmt.NewConstList([]node.Node{stmt.NewConstant(node.NewIdentifier(rawDefineName), fncall.ArgumentList.Arguments[1].(*node.Argument).Expr, "")}))
+			}
 		}
 
 		// Assignment expressions can take on better error-handling behaviour