diff --git a/build.gradle b/build.gradle
index ea036faa66..af4ae64c5c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -188,6 +188,12 @@ subprojects { subProject ->
 
 	// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 	// compilation
+	compileJava.options.encoding = 'UTF-8'
+
+	tasks.withType(JavaCompile) {
+		options.encoding = 'UTF-8'
+	}
+
 	task compile
 	compile.dependsOn compileJava, processResources, compileTestJava, processTestResources
 
diff --git a/hibernate-core/src/main/java/org/hibernate/internal/util/ReflectHelper.java b/hibernate-core/src/main/java/org/hibernate/internal/util/ReflectHelper.java
index 4e8e656aea..7dca09c84f 100644
--- a/hibernate-core/src/main/java/org/hibernate/internal/util/ReflectHelper.java
+++ b/hibernate-core/src/main/java/org/hibernate/internal/util/ReflectHelper.java
@@ -36,7 +36,7 @@ import org.hibernate.type.Type;
 public final class ReflectHelper {
 
 	private static final Pattern JAVA_CONSTANT_PATTERN = Pattern.compile(
-			"[a-z]+\\.([A-Z]{1}[a-z]+)+\\$?([A-Z]{1}[a-z]+)*\\.[A-Z_\\$]+" );
+			"[a-z\\d]+\\.([A-Z]{1}[a-z\\d]+)+\\$?([A-Z]{1}[a-z\\d]+)*\\.[A-Z_\\$]+", Pattern.UNICODE_CHARACTER_CLASS);
 
 	public static final Class[] NO_PARAM_SIGNATURE = new Class[0];
 	public static final Object[] NO_PARAMS = new Object[0];
diff --git a/hibernate-core/src/test/java/org/hibernate/internal/util/ReflectHelperTest.java b/hibernate-core/src/test/java/org/hibernate/internal/util/ReflectHelperTest.java
index cf2e1cb3e0..337540e05b 100644
--- a/hibernate-core/src/test/java/org/hibernate/internal/util/ReflectHelperTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/internal/util/ReflectHelperTest.java
@@ -11,6 +11,7 @@ import javax.persistence.FetchType;
 import org.hibernate.boot.registry.classloading.spi.ClassLoaderService;
 import org.hibernate.boot.spi.SessionFactoryOptions;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.hib3rnat3.C0nst4nts३;
 import org.hibernate.service.spi.ServiceRegistryImplementor;
 
 import org.junit.Before;
@@ -123,4 +124,14 @@ public class ReflectHelperTest {
 		assertEquals( Status.ON, value );
 		verify(classLoaderServiceMock, times(1)).classForName( eq("org.hibernate.internal.util.ReflectHelperTest$Status") );
 	}
+
+	@Test
+	public void test_getConstantValue_constant_digits() {
+
+		when( sessionFactoryOptionsMock.isConventionalJavaConstants() ).thenReturn( true );
+		when( classLoaderServiceMock.classForName( "org.hibernate.internal.util.hib3rnat3.C0nst4nts३" ) ).thenReturn( (Class) C0nst4nts३.class );
+		Object value = ReflectHelper.getConstantValue( "org.hibernate.internal.util.hib3rnat3.C0nst4nts३.ABC_DEF", sessionFactoryImplementorMock);
+		assertEquals( C0nst4nts३.ABC_DEF, value );
+		verify(classLoaderServiceMock, times(1)).classForName( eq("org.hibernate.internal.util.hib3rnat3.C0nst4nts३") );
+	}
 }
\ No newline at end of file
diff --git a/hibernate-core/src/test/java/org/hibernate/internal/util/hib3rnat3/C0nst4nts३.java b/hibernate-core/src/test/java/org/hibernate/internal/util/hib3rnat3/C0nst4nts३.java
new file mode 100644
index 0000000000..45ae620d92
--- /dev/null
+++ b/hibernate-core/src/test/java/org/hibernate/internal/util/hib3rnat3/C0nst4nts३.java
@@ -0,0 +1,15 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.internal.util.hib3rnat3;
+
+/**
+ * @author Vlad Mihalcea
+ */
+public class C0nst4nts३ {
+
+	public static final String ABC_DEF = "xyz";
+}