diff --git a/src/slurmctld/burst_buffer.c b/src/slurmctld/burst_buffer.c
index 0a93f2095dbe1427b96895879196db83c5efeff1..474d63acfc9aff43703c5304791834e089ff36ad 100644
--- a/src/slurmctld/burst_buffer.c
+++ b/src/slurmctld/burst_buffer.c
@@ -394,7 +394,7 @@ extern void bb_g_job_set_tres_cnt(struct job_record *job_ptr,
 }
 
 /* sort jobs by expected start time */
-extern int _sort_job_queue(void *x, void *y)
+static int _sort_job_queue(void *x, void *y)
 {
 	struct job_record *job_ptr1 = *(struct job_record **) x;
 	struct job_record *job_ptr2 = *(struct job_record **) y;