diff --git a/src/jtag/core.c b/src/jtag/core.c
index 45ece3c4c..5edcce22c 100644
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -88,7 +88,7 @@ static int jtag_nsrst_delay = 0; /* default to no nSRST delay */
 static int jtag_ntrst_delay = 0; /* default to no nTRST delay */
 
 /* callbacks to inform high-level handlers about JTAG state changes */
-jtag_event_callback_t *jtag_event_callbacks;
+static jtag_event_callback_t *jtag_event_callbacks;
 
 /* speed in kHz*/
 static int speed_khz = 0;
diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h
index 40639dce6..fd4953ec0 100644
--- a/src/jtag/jtag.h
+++ b/src/jtag/jtag.h
@@ -255,8 +255,6 @@ typedef struct jtag_event_callback_s
 	struct jtag_event_callback_s* next;
 } jtag_event_callback_t;
 
-extern jtag_event_callback_t* jtag_event_callbacks;
-
 extern int jtag_speed;
 extern int jtag_speed_post_reset;