diff --git a/lib_dec/lib_dec.h b/lib_dec/lib_dec.h
index 0de964b15ca37c0fcd0d29e670d3bae52c2369e2..d107995ffeb3535cd78e76a540e421c39b7e938b 100644
--- a/lib_dec/lib_dec.h
+++ b/lib_dec/lib_dec.h
@@ -212,17 +212,6 @@ ivas_error IVAS_DEC_EnableVoIP(
     const IVAS_DEC_INPUT_FORMAT inputFormat     /* i  : format of the input bitstream                                           */
 );
 
-/*! r: error code */
-ivas_error IVAS_DEC_SetHeadrotation(
-    IVAS_DEC_HANDLE hIvasDec,                   /* i/o: IVAS decoder handle                                                     */
-    const float w,                              /* i  : w-coordinate of head rotation quaternion                                */
-    const float x,                              /* i  : x-coordinate of head rotation quaternion                                */
-    const float y,                              /* i  : y-coordinate of head rotation quaternion                                */
-    const float z,                              /* i  : z-coordinate of head rotation quaternion                                */
-    const uint16_t i                            /* i  : subframe index within current frame                                     */
-);
-
-
 #ifdef DEBUGGING
 bool IVAS_DEC_GetBerDetectFlag(
     IVAS_DEC_HANDLE hIvasDec                    /* i  : IVAS decoder handle                                                     */