diff --git a/classpath/java-lang.cpp b/classpath/java-lang.cpp
index ebb272a3e0..39098ca4c4 100644
--- a/classpath/java-lang.cpp
+++ b/classpath/java-lang.cpp
@@ -423,6 +423,12 @@ Java_java_lang_Math_sin(JNIEnv*, jclass, jdouble val)
   return sin(val);
 }
 
+extern "C" JNIEXPORT jdouble JNICALL
+Java_java_lang_Math_cos(JNIEnv*, jclass, jdouble val)
+{
+  return cos(val);
+}
+
 extern "C" JNIEXPORT jdouble JNICALL
 Java_java_lang_Math_sqrt(JNIEnv*, jclass, jdouble val)
 {