diff --git a/classpath/java-lang.cpp b/classpath/java-lang.cpp
index 704e2ae6a5..88a4cf5ef6 100644
--- a/classpath/java-lang.cpp
+++ b/classpath/java-lang.cpp
@@ -898,6 +898,11 @@ Java_java_lang_Math_atan(JNIEnv*, jclass, jdouble val)
   return atan(val);
 }
 
+extern "C" JNIEXPORT jdouble JNICALL
+Java_java_lang_Math_atan2(JNIEnv*, jclass, jdouble y, jdouble x)
+{
+  return atan2(y, x);
+}
 
 extern "C" JNIEXPORT jdouble JNICALL
 Java_java_lang_Math_sinh(JNIEnv*, jclass, jdouble val)
@@ -917,7 +922,6 @@ Java_java_lang_Math_tanh(JNIEnv*, jclass, jdouble val)
   return tanh(val);
 }
 
-
 extern "C" JNIEXPORT jdouble JNICALL
 Java_java_lang_Math_sqrt(JNIEnv*, jclass, jdouble val)
 {