diff --git a/transpile_python/service.go b/transpile_python/service.go
index 74e19ca..c930418 100644
--- a/transpile_python/service.go
+++ b/transpile_python/service.go
@@ -253,8 +253,6 @@ func handleFuncDecl(decl ast.Decl) string {
 	}
 	code += "def "
 	name := ""
-	code += handleFuncDeclType(fd.Type)
-	code += ""
 	name = handleFuncDeclName(fd.Name)
 	if name == "NewController" {
 		return ""
@@ -314,7 +312,7 @@ func handleFuncDeclParams(t *ast.FuncType) string {
 			ftype = handleIdent(ft)
 		}
 		for _, names := range field.Names {
-			values = append(values, ftype+""+names.Name)
+			values = append(values, names.Name)
 		}
 	}
 	code += strings.Join(values, ",")
diff --git a/transpile_python/service_test.go b/transpile_python/service_test.go
index e75ede5..50c544a 100644
--- a/transpile_python/service_test.go
+++ b/transpile_python/service_test.go
@@ -376,6 +376,48 @@ def vdiv(inp,outp,param):
 def main():
 	v = vdiv(inp,outp,"500")
 main()
+`
+			Compare(source, expected)
+		})
+
+		It("Interfaces", func() {
+			source := `package test
+				//@subcircuit
+				func mem_module(intfc any) {
+					ram := Part("Memory_RAM", "AS6C1616")
+					ram["A[0:19]"] += intfc.addr
+					ram["DQ[0:15]"] += intfc.data
+					ram["WE#"] += intfc.wr
+					ram["OE#"] += intfc["rd"]
+				}
+
+				func main() {
+					rd := Net("MEM_RD#")
+					wr := Net("MEM_WR#")
+					addr := Bus("MEM_ADDR", 20)
+					data := Bus("MEM_DATA", 16)
+					mem_intfc = Interface(rd, wr, addr, data)
+					mem_module(mem_intfc)
+					uc_module(clk, mem_intfc, io_intfc)
+				}
+				`
+			expected := `from skidl import *
+@subcircuit
+def mem_module(intfc):
+	ram = Part("Memory_RAM","AS6C1616")
+	ram["A[0:19]"] += intfc.addr
+	ram["DQ[0:15]"] += intfc.data
+	ram["WE#"] += intfc.wr
+	ram["OE#"] += intfc["rd"]
+def main():
+	rd = Net("MEM_RD#")
+	wr = Net("MEM_WR#")
+	addr = Bus("MEM_ADDR",20)
+	data = Bus("MEM_DATA",16)
+	mem_intfc = Interface(rd,wr,addr,data)
+	mem_module(mem_intfc)
+	uc_module(clk,mem_intfc,io_intfc)
+main()
 `
 			Compare(source, expected)
 		})