diff --git a/libc/docs/CHANGES.TXT b/libc/docs/CHANGES.TXT
index e72b422..96da044 100644
--- a/libc/docs/CHANGES.TXT
+++ b/libc/docs/CHANGES.TXT
@@ -5,6 +5,8 @@
 
 - <pthread.h>: Add reader/writer locks implementation.
 
+- <math.h>: Added sincos() and sincosf() (GLibc compatibility).
+
 -------------------------------------------------------------------------------
 Differences between Android 2.2. and Android 2.1:
 
diff --git a/libm/Android.mk b/libm/Android.mk
index fa73aff..28e8f33 100644
--- a/libm/Android.mk
+++ b/libm/Android.mk
@@ -3,6 +3,7 @@
 libm_common_src_files:= \
 	isinf.c  \
 	fpclassify.c \
+	sincos.c \
 	bsdsrc/b_exp.c \
 	bsdsrc/b_log.c \
 	bsdsrc/b_tgamma.c \
diff --git a/libm/include/math.h b/libm/include/math.h
index ef6a9e6..6c0d4eb 100644
--- a/libm/include/math.h
+++ b/libm/include/math.h
@@ -480,6 +480,12 @@
 #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);
+#endif
+
 /* #endif */ /* __ISO_C_VISIBLE >= 1999 */
 __END_DECLS
 
diff --git a/libm/sincos.c b/libm/sincos.c
new file mode 100644
index 0000000..ddbc420
--- /dev/null
+++ b/libm/sincos.c
@@ -0,0 +1,40 @@
+/*-
+ * 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);
+}