--- a/servo/components/style/gecko_bindings/bindings.rs
+++ b/servo/components/style/gecko_bindings/bindings.rs
@@ -1417,17 +1417,17 @@ extern "C" {
      -> bool;
 }
 extern "C" {
     pub fn Servo_DeclarationBlock_SetIdentStringValue(declarations:
                                                           RawServoDeclarationBlockBorrowed,
                                                       property:
                                                           nsCSSPropertyID,
                                                       value:
-                                                          *const nsACString_internal);
+                                                          *const nsAString_internal);
 }
 extern "C" {
     pub fn Servo_DeclarationBlock_SetKeywordValue(declarations:
                                                       RawServoDeclarationBlockBorrowed,
                                                   property: nsCSSPropertyID,
                                                   value: i32);
 }
 extern "C" {
@@ -1463,17 +1463,17 @@ extern "C" {
                                                     RawServoDeclarationBlockBorrowed,
                                                 property: nsCSSPropertyID,
                                                 value: nscolor);
 }
 extern "C" {
     pub fn Servo_DeclarationBlock_SetFontFamily(declarations:
                                                     RawServoDeclarationBlockBorrowed,
                                                 value:
-                                                    *const nsACString_internal);
+                                                    *const nsAString_internal);
 }
 extern "C" {
     pub fn Servo_DeclarationBlock_SetTextDecorationColorOverride(declarations:
                                                                      RawServoDeclarationBlockBorrowed);
 }
 extern "C" {
     pub fn Servo_CSSSupports2(name: *const nsACString_internal,
                               value: *const nsACString_internal) -> bool;