diff --git a/runtime/modifiers.h b/runtime/modifiers.h
index 2814ed8..23c18f8 100644
--- a/runtime/modifiers.h
+++ b/runtime/modifiers.h
@@ -19,48 +19,77 @@
 
 #include <stdint.h>
 
-static const uint32_t kAccPublic = 0x0001;  // class, field, method, ic
-static const uint32_t kAccPrivate = 0x0002;  // field, method, ic
-static const uint32_t kAccProtected = 0x0004;  // field, method, ic
-static const uint32_t kAccStatic = 0x0008;  // field, method, ic
-static const uint32_t kAccFinal = 0x0010;  // class, field, method, ic
-static const uint32_t kAccSynchronized = 0x0020;  // method (only allowed on natives)
-static const uint32_t kAccSuper = 0x0020;  // class (not used in dex)
-static const uint32_t kAccVolatile = 0x0040;  // field
-static const uint32_t kAccBridge = 0x0040;  // method (1.5)
-static const uint32_t kAccTransient = 0x0080;  // field
-static const uint32_t kAccVarargs = 0x0080;  // method (1.5)
-static const uint32_t kAccNative = 0x0100;  // method
-static const uint32_t kAccInterface = 0x0200;  // class, ic
-static const uint32_t kAccAbstract = 0x0400;  // class, method, ic
-static const uint32_t kAccStrict = 0x0800;  // method
-static const uint32_t kAccSynthetic = 0x1000;  // class, field, method, ic
-static const uint32_t kAccAnnotation = 0x2000;  // class, ic (1.5)
-static const uint32_t kAccEnum = 0x4000;  // class, field, ic (1.5)
+static constexpr uint32_t kAccPublic =       0x0001;  // class, field, method, ic
+static constexpr uint32_t kAccPrivate =      0x0002;  // field, method, ic
+static constexpr uint32_t kAccProtected =    0x0004;  // field, method, ic
+static constexpr uint32_t kAccStatic =       0x0008;  // field, method, ic
+static constexpr uint32_t kAccFinal =        0x0010;  // class, field, method, ic
+static constexpr uint32_t kAccSynchronized = 0x0020;  // method (only allowed on natives)
+static constexpr uint32_t kAccSuper =        0x0020;  // class (not used in dex)
+static constexpr uint32_t kAccVolatile =     0x0040;  // field
+static constexpr uint32_t kAccBridge =       0x0040;  // method (1.5)
+static constexpr uint32_t kAccTransient =    0x0080;  // field
+static constexpr uint32_t kAccVarargs =      0x0080;  // method (1.5)
+static constexpr uint32_t kAccNative =       0x0100;  // method
+static constexpr uint32_t kAccInterface =    0x0200;  // class, ic
+static constexpr uint32_t kAccAbstract =     0x0400;  // class, method, ic
+static constexpr uint32_t kAccStrict =       0x0800;  // method
+static constexpr uint32_t kAccSynthetic =    0x1000;  // class, field, method, ic
+static constexpr uint32_t kAccAnnotation =   0x2000;  // class, ic (1.5)
+static constexpr uint32_t kAccEnum =         0x4000;  // class, field, ic (1.5)
 
-static const uint32_t kAccMiranda = 0x8000;  // method
+static constexpr uint32_t kAccJavaFlagsMask = 0xffff;  // bits set from Java sources (low 16)
 
-static const uint32_t kAccJavaFlagsMask = 0xffff;  // bits set from Java sources (low 16)
-
-static const uint32_t kAccConstructor = 0x00010000;  // method (dex only) <init> and <clinit>
-static const uint32_t kAccDeclaredSynchronized = 0x00020000;  // method (dex only)
-static const uint32_t kAccClassIsProxy = 0x00040000;  // class (dex only)
-static const uint32_t kAccPreverified = 0x00080000;  // class (runtime), method (dex only)
-static const uint32_t kAccFastNative = 0x0080000;  // method (dex only)
-static const uint32_t kAccPortableCompiled = 0x0100000;  // method (dex only)
+static constexpr uint32_t kAccConstructor =          0x00010000;  // method (dex only) <(cl)init>
+static constexpr uint32_t kAccDeclaredSynchronized = 0x00020000;  // method (dex only)
+static constexpr uint32_t kAccClassIsProxy =         0x00040000;  // class  (dex only)
+static constexpr uint32_t kAccPreverified =          0x00080000;  // class (runtime),
+                                                                  // method (dex only)
+static constexpr uint32_t kAccFastNative =           0x00080000;  // method (dex only)
+static constexpr uint32_t kAccPortableCompiled =     0x00100000;  // method (dex only)
+static constexpr uint32_t kAccMiranda =              0x00200000;  // method (dex only)
 
 // Special runtime-only flags.
 // Note: if only kAccClassIsReference is set, we have a soft reference.
-static const uint32_t kAccClassIsFinalizable        = 0x80000000;  // class/ancestor overrides finalize()
-static const uint32_t kAccClassIsReference          = 0x08000000;  // class is a soft/weak/phantom ref
-static const uint32_t kAccClassIsWeakReference      = 0x04000000;  // class is a weak reference
-static const uint32_t kAccClassIsFinalizerReference = 0x02000000;  // class is a finalizer reference
-static const uint32_t kAccClassIsPhantomReference   = 0x01000000;  // class is a phantom reference
 
-static const uint32_t kAccReferenceFlagsMask = (kAccClassIsReference
-                                                | kAccClassIsWeakReference
-                                                | kAccClassIsFinalizerReference
-                                                | kAccClassIsPhantomReference);
+// class/ancestor overrides finalize()
+static constexpr uint32_t kAccClassIsFinalizable        = 0x80000000;
+// class is a soft/weak/phantom ref
+static constexpr uint32_t kAccClassIsReference          = 0x08000000;
+// class is a weak reference
+static constexpr uint32_t kAccClassIsWeakReference      = 0x04000000;
+// class is a finalizer reference
+static constexpr uint32_t kAccClassIsFinalizerReference = 0x02000000;
+// class is a phantom reference
+static constexpr uint32_t kAccClassIsPhantomReference   = 0x01000000;
+
+static constexpr uint32_t kAccReferenceFlagsMask = (kAccClassIsReference
+                                                  | kAccClassIsWeakReference
+                                                  | kAccClassIsFinalizerReference
+                                                  | kAccClassIsPhantomReference);
+
+// Valid (meaningful) bits for a field.
+static constexpr uint32_t kAccValidFieldFlags = kAccPublic | kAccPrivate | kAccProtected |
+    kAccStatic | kAccFinal | kAccVolatile | kAccTransient | kAccSynthetic | kAccEnum;
+
+// Valid (meaningful) bits for a method.
+static constexpr uint32_t kAccValidMethodFlags = kAccPublic | kAccPrivate | kAccProtected |
+    kAccStatic | kAccFinal | kAccSynchronized | kAccBridge | kAccVarargs | kAccNative |
+    kAccAbstract | kAccStrict | kAccSynthetic | kAccMiranda | kAccConstructor |
+    kAccDeclaredSynchronized;
+
+// Valid (meaningful) bits for a class (not interface).
+// Note 1. These are positive bits. Other bits may have to be zero.
+// Note 2. Inner classes can expose more access flags to Java programs. That is handled by libcore.
+static constexpr uint32_t kAccValidClassFlags = kAccPublic | kAccFinal | kAccSuper |
+    kAccAbstract | kAccSynthetic | kAccEnum;
+
+// Valid (meaningful) bits for an interface.
+// Note 1. Annotations are interfaces.
+// Note 2. These are positive bits. Other bits may have to be zero.
+// Note 3. Inner classes can expose more access flags to Java programs. That is handled by libcore.
+static constexpr uint32_t kAccValidInterfaceFlags = kAccPublic | kAccInterface |
+    kAccAbstract | kAccSynthetic | kAccAnnotation;
 
 #endif  // ART_RUNTIME_MODIFIERS_H_