diff --git a/pkg/postal/expand.go b/pkg/postal/expand.go
index 43df7ba..42e2156 100644
--- a/pkg/postal/expand.go
+++ b/pkg/postal/expand.go
@@ -89,8 +89,7 @@ func ExpandAddressOptions(address string, options ExpandOptions) []string {
 		cLanguages := C.calloc(C.size_t(len(options.Languages)), C.size_t(ptrSize))
 		cLanguagesPtr := (*[1 << 30]*C.char)(unsafe.Pointer(cLanguages))
 
-		var cLang C.String
-
+		var cLang *C.char
 		defer C.free(unsafe.Pointer(cLang))
 		defer C.free(unsafe.Pointer(cLanguages))
 
@@ -133,7 +132,7 @@ func ExpandAddressOptions(address string, options ExpandOptions) []string {
 	var expansions = make([]string, numExpansions)
 
 	// Accessing a C array
-	cExpansionsPtr := (*[1 << 30]*C.char)(unsafe.Pointer(cExpansions))
+	cExpansionsPtr := (*[1 << 30](*C.char))(unsafe.Pointer(cExpansions))
 
 	var i uint64
 	for i = 0; i < numExpansions; i++ {