diff --git a/cblas.h b/cblas.h
index 768e0c92d..0bf2c714d 100644
--- a/cblas.h
+++ b/cblas.h
@@ -27,7 +27,7 @@ char* openblas_get_corename(void);
 
 /*Set the threading backend to a custom callback.*/
 typedef void (*openblas_dojob_callback)(int thread_num, void *jobdata, void *dojob_data);
-typedef void (*openblas_threads_callback)(void *callback_data, openblas_dojob_callback dojob, int numjobs, size_t jobdata_elsize, void *jobdata, void *dojob_data);
+typedef void (*openblas_threads_callback)(void *callback_data, int sync, openblas_dojob_callback dojob, int numjobs, size_t jobdata_elsize, void *jobdata, void *dojob_data);
 void openblas_set_threads_callback(openblas_threads_callback callback, void *callback_data);
 
 /* Get the parallelization type which is used by OpenBLAS */
diff --git a/common_interface.h b/common_interface.h
index 7a58cafd2..38c6e7011 100644
--- a/common_interface.h
+++ b/common_interface.h
@@ -48,7 +48,7 @@ int    BLASFUNC(xerbla)(char *, blasint *info, blasint);
 void    openblas_set_num_threads_(int *);
 
 typedef void (*openblas_dojob_callback)(int thread_num, void *jobdata, void *dojob_data);
-typedef void (*openblas_threads_callback)(void *callback_data, openblas_dojob_callback dojob, int numjobs, size_t jobdata_elsize, void *jobdata, void *dojob_data);
+typedef void (*openblas_threads_callback)(void *callback_data, int sync, openblas_dojob_callback dojob, int numjobs, size_t jobdata_elsize, void *jobdata, void *dojob_data);
 void openblas_set_threads_callback(openblas_threads_callback callback, void *callback_data);
 extern openblas_threads_callback openblas_threads_callback_;
 extern void *openblas_threads_callback_data_;
diff --git a/driver/others/blas_server_omp.c b/driver/others/blas_server_omp.c
index a26e43be2..f1f49682d 100644
--- a/driver/others/blas_server_omp.c
+++ b/driver/others/blas_server_omp.c
@@ -339,7 +339,7 @@ int exec_blas(BLASLONG num, blas_queue_t *queue){
     for (i = 0; i < num; i ++)
       queue[i].position = i;
 #endif
-    openblas_threads_callback_(openblas_threads_callback_data_, (openblas_dojob_callback) exec_threads, num, sizeof(blas_queue_t), (void*) queue, (void*) &buf_index);
+    openblas_threads_callback_(openblas_threads_callback_data_, 1, (openblas_dojob_callback) exec_threads, num, sizeof(blas_queue_t), (void*) queue, (void*) &buf_index);
     return;
   }