diff --git a/src/main/java/com/squareup/javapoet/FieldSpec.java b/src/main/java/com/squareup/javapoet/FieldSpec.java
index f530d6ecb..99157780a 100644
--- a/src/main/java/com/squareup/javapoet/FieldSpec.java
+++ b/src/main/java/com/squareup/javapoet/FieldSpec.java
@@ -158,6 +158,13 @@ public Builder addModifiers(Modifier... modifiers) {
       return this;
     }
 
+    public Builder addModifiers(Iterable<Modifier> modifiers) {
+      for (Modifier modifier : modifiers) {
+        this.modifiers.add(modifier);
+      }
+      return this;
+    }
+
     public Builder initializer(String format, Object... args) {
       return initializer(CodeBlock.of(format, args));
     }
diff --git a/src/main/java/com/squareup/javapoet/TypeSpec.java b/src/main/java/com/squareup/javapoet/TypeSpec.java
index 6cd2ea636..7e77ae418 100644
--- a/src/main/java/com/squareup/javapoet/TypeSpec.java
+++ b/src/main/java/com/squareup/javapoet/TypeSpec.java
@@ -474,6 +474,13 @@ public Builder addModifiers(Modifier... modifiers) {
       return this;
     }
 
+    public Builder addModifiers(Iterable<Modifier> modifiers) {
+      for (Modifier modifier : modifiers) {
+        this.modifiers.add(modifier);
+      }
+      return this;
+    }
+
     public Builder addTypeVariables(Iterable<TypeVariableName> typeVariables) {
       checkArgument(typeVariables != null, "typeVariables == null");
       for (TypeVariableName typeVariable : typeVariables) {