diff --git a/source/blender/python/api2_2x/Mathutils.c b/source/blender/python/api2_2x/Mathutils.c
index cf79b3071f7..65ae46ffccd 100644
--- a/source/blender/python/api2_2x/Mathutils.c
+++ b/source/blender/python/api2_2x/Mathutils.c
@@ -1,5 +1,5 @@
 /* 
- * $Id: Mathutils.c 11502 2007-08-06 14:27:08Z khughes $
+ * $Id$
  *
  * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
  *
@@ -500,10 +500,7 @@ PyObject *M_Mathutils_AngleBetweenVecs(PyObject * self, PyObject * args)
 	}
 	dot /= (sqrt(test_v1) * sqrt(test_v2));
 
-	if (dot < -1.0f || dot > 1.0f) {
-		CLAMP(dot,-1.0f,1.0f);
-	}
-	angleRads = (double)acos(dot);
+	angleRads = (double)saacos(dot);
 
 	return PyFloat_FromDouble(angleRads * (180/ Py_PI));
 
diff --git a/source/blender/python/api2_2x/quat.c b/source/blender/python/api2_2x/quat.c
index 19e749f187c..a4a99c28d72 100644
--- a/source/blender/python/api2_2x/quat.c
+++ b/source/blender/python/api2_2x/quat.c
@@ -1,5 +1,5 @@
 /*
- * $Id: quat.c 12314 2007-10-20 20:24:09Z campbellbarton $
+ * $Id$
  *
  * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
  *
@@ -184,13 +184,13 @@ static PyObject *Quaternion_getattr(QuaternionObject * self, char *name)
 	}
 	if(STREQ(name, "angle")) {
 		mag = self->quat[0];
-		mag = 2 * (acos(mag));
+		mag = 2 * (saacos(mag));
 		mag *= (180 / Py_PI);
 		return PyFloat_FromDouble(mag);
 	}
 	if(STREQ(name, "axis")) {
 		mag = self->quat[0] * (Py_PI / 180);
-		mag = 2 * (acos(mag));
+		mag = 2 * (saacos(mag));
 		mag = sin(mag / 2);
 		for(x = 0; x < 3; x++) {
 			vec[x] = (float)(self->quat[x + 1] / mag);