diff --git a/src/server/slavefuncs.c b/src/server/slavefuncs.c
--- a/src/server/slavefuncs.c
+++ b/src/server/slavefuncs.c
@@ -364,7 +364,7 @@ return 1; // Success
 
 
 /** Executor function for Blender operations */
-void exec_blender(struct distrenjob* distrenjob, char *input, char *output, int frame)
+void exec_blender(struct distrenjob* distrenjob, char *input, char *output, int frame, int threads)
 {
   int ret;
   char *frame_str;