diff --git a/src/jtag/drivers/bcm2835gpio.c b/src/jtag/drivers/bcm2835gpio.c
index 635d9a5ff..879ca3c84 100644
--- a/src/jtag/drivers/bcm2835gpio.c
+++ b/src/jtag/drivers/bcm2835gpio.c
@@ -19,7 +19,7 @@
 
 #include <sys/mman.h>
 
-uint32_t bcm2835_peri_base = 0x20000000;
+static uint32_t bcm2835_peri_base = 0x20000000;
 #define BCM2835_GPIO_BASE	(bcm2835_peri_base + 0x200000) /* GPIO controller */
 
 #define BCM2835_PADS_GPIO_0_27		(bcm2835_peri_base + 0x100000)
diff --git a/src/jtag/drivers/ep93xx.c b/src/jtag/drivers/ep93xx.c
index 393fc7e85..5cb6dff24 100644
--- a/src/jtag/drivers/ep93xx.c
+++ b/src/jtag/drivers/ep93xx.c
@@ -37,7 +37,7 @@ static int ep93xx_reset(int trst, int srst);
 static int ep93xx_init(void);
 static int ep93xx_quit(void);
 
-struct timespec ep93xx_zzzz;
+static struct timespec ep93xx_zzzz;
 
 static struct jtag_interface ep93xx_interface = {
 	.supported = DEBUG_CAP_TMS_SEQ,
diff --git a/src/jtag/drivers/vdebug.c b/src/jtag/drivers/vdebug.c
index 7898e9d9b..9223be23f 100644
--- a/src/jtag/drivers/vdebug.c
+++ b/src/jtag/drivers/vdebug.c
@@ -344,7 +344,7 @@ static uint32_t vdebug_wait_server(int hsock, struct vd_shm *pmem)
 	return rc;
 }
 
-int vdebug_run_jtag_queue(int hsock, struct vd_shm *pm, unsigned int count)
+static int vdebug_run_jtag_queue(int hsock, struct vd_shm *pm, unsigned int count)
 {
 	uint8_t  num_pre, num_post, tdi, tms;
 	unsigned int num, anum, bytes, hwords, words;
@@ -420,7 +420,7 @@ int vdebug_run_jtag_queue(int hsock, struct vd_shm *pm, unsigned int count)
 	return rc;
 }
 
-int vdebug_run_reg_queue(int hsock, struct vd_shm *pm, unsigned int count)
+static int vdebug_run_reg_queue(int hsock, struct vd_shm *pm, unsigned int count)
 {
 	unsigned int num, awidth, wwidth;
 	unsigned int req, waddr, rwords;