diff --git a/ffi/java/com/herumi/mcl/G1.java b/ffi/java/com/herumi/mcl/G1.java
index d46e3f1..ebfb851 100644
--- a/ffi/java/com/herumi/mcl/G1.java
+++ b/ffi/java/com/herumi/mcl/G1.java
@@ -56,6 +56,10 @@ public class G1 {
     return MclJNI.G1_isZero(swigCPtr, this);
   }
 
+  public boolean isValidOrder() {
+    return MclJNI.G1_isValidOrder(swigCPtr, this);
+  }
+
   public void set(Fp x, Fp y) {
     MclJNI.G1_set(swigCPtr, this, Fp.getCPtr(x), x, Fp.getCPtr(y), y);
   }
diff --git a/ffi/java/com/herumi/mcl/MclJNI.java b/ffi/java/com/herumi/mcl/MclJNI.java
index 05345c2..9724511 100644
--- a/ffi/java/com/herumi/mcl/MclJNI.java
+++ b/ffi/java/com/herumi/mcl/MclJNI.java
@@ -69,6 +69,7 @@ public class MclJNI {
   public final static native long new_G1__SWIG_2(long jarg1, Fp jarg1_, long jarg2, Fp jarg2_);
   public final static native boolean G1_equals(long jarg1, G1 jarg1_, long jarg2, G1 jarg2_);
   public final static native boolean G1_isZero(long jarg1, G1 jarg1_);
+  public final static native boolean G1_isValidOrder(long jarg1, G1 jarg1_);
   public final static native void G1_set(long jarg1, G1 jarg1_, long jarg2, Fp jarg2_, long jarg3, Fp jarg3_);
   public final static native void G1_clear(long jarg1, G1 jarg1_);
   public final static native void G1_setStr__SWIG_0(long jarg1, G1 jarg1_, String jarg2, int jarg3);
diff --git a/ffi/java/mcl_impl.hpp b/ffi/java/mcl_impl.hpp
index 2319114..108ecac 100644
--- a/ffi/java/mcl_impl.hpp
+++ b/ffi/java/mcl_impl.hpp
@@ -222,6 +222,7 @@ public:
 		: self_(x.self_, y.self_) { }
 	bool equals(const G1& rhs) const { return self_ == rhs.self_; }
 	bool isZero() const { return self_.isZero(); }
+	bool isValidOrder() const { return self_.isValidOrder(); }
 	void set(const Fp& x, const Fp& y) throw(std::exception)
 	{
 		self_.set(x.self_, y.self_);
diff --git a/ffi/java/mcl_wrap.cxx b/ffi/java/mcl_wrap.cxx
index 802c722..5b35055 100644
--- a/ffi/java/mcl_wrap.cxx
+++ b/ffi/java/mcl_wrap.cxx
@@ -1592,6 +1592,19 @@ SWIGEXPORT jboolean JNICALL Java_com_herumi_mcl_MclJNI_G1_1isZero(JNIEnv *jenv,
   return jresult;
 }
 
+SWIGEXPORT jboolean JNICALL Java_com_herumi_mcl_MclJNI_G1_1isValidOrder(JNIEnv *jenv, jclass jcls, jlong jarg1, jobject jarg1_) {
+    jboolean jresult = 0 ;
+    G1 *arg1 = (G1 *) 0 ;
+    bool result;
+
+    (void)jenv;
+    (void)jcls;
+    (void)jarg1_;
+    arg1 = *(G1 **)&jarg1;
+    result = (bool)((G1 const *)arg1)->isValidOrder();
+    jresult = (jboolean)result;
+    return jresult;
+}
 
 SWIGEXPORT void JNICALL Java_com_herumi_mcl_MclJNI_G1_1set(JNIEnv *jenv, jclass jcls, jlong jarg1, jobject jarg1_, jlong jarg2, jobject jarg2_, jlong jarg3, jobject jarg3_) {
   G1 *arg1 = (G1 *) 0 ;