diff --git a/libc/docs/CHANGES.TXT b/libc/docs/CHANGES.TXT
index ee4c34c..c8bdb6f 100644
--- a/libc/docs/CHANGES.TXT
+++ b/libc/docs/CHANGES.TXT
@@ -8,6 +8,8 @@
 - <semaphore.h>: Use private futexes for semaphore implementation,
   unless your set 'pshared' to non-0 when calling sem_init().
 
+- <math.h>: Added sincos(), sincosf() and sincosl() (GLibc compatibility).
+
 - <sys/sysinfo.h>: Added missing sysinfo() system call implementation
   (the function was already declared in the header though).
 
diff --git a/libm/include/math.h b/libm/include/math.h
index ef6a9e6..3b5660f 100644
--- a/libm/include/math.h
+++ b/libm/include/math.h
@@ -480,6 +480,13 @@
 #endif
 long double	truncl(long double);
 
+/* BIONIC: GLibc compatibility - required by the ARM toolchain */
+#ifdef _GNU_SOURCE
+void  sincos(double x, double *sin, double *cos);
+void  sincosf(float x, float *sin, float *cos);
+void  sincosl(long double x, long double *sin, long double *cos);
+#endif
+
 /* #endif */ /* __ISO_C_VISIBLE >= 1999 */
 __END_DECLS
 
diff --git a/libm/sincos.c b/libm/sincos.c
new file mode 100644
index 0000000..116b151
--- /dev/null
+++ b/libm/sincos.c
@@ -0,0 +1,46 @@
+/*-
+ * Copyright (c) 2010 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+#define _GNU_SOURCE 1
+#include <math.h>
+
+void  sincos(double x, double *psin, double *pcos)
+{
+    *psin = sin(x);
+    *pcos = cos(x);
+}
+
+void  sincosf(float x, float *psin, float *pcos)
+{
+    *psin = sinf(x);
+    *pcos = cosf(x);
+}
+
+void  sincosl(long double x, long double *psin, long double *pcos)
+{
+    *psin = sin(x);
+    *pcos = cos(x);
+}