diff --git a/sys/src/9/bcm/emmc.c b/sys/src/9/bcm/emmc.c
index fd6b1e50e..53efe4325 100644
--- a/sys/src/9/bcm/emmc.c
+++ b/sys/src/9/bcm/emmc.c
@@ -122,7 +122,7 @@ enum {
 	Cmdinhibit	= 1<<0,
 };
 
-int cmdinfo[64] = {
+static int cmdinfo[64] = {
 [0]  Ixchken,
 [2]  Resp136,
 [3]  Resp48 | Ixchken | Crcchken,
@@ -350,7 +350,7 @@ emmccmd(u32int cmd, u32int arg, u32int *resp)
 	return 0;
 }
 
-void
+static void
 emmciosetup(int write, void *buf, int bsize, int bcount)
 {
 	USED(write);
diff --git a/sys/src/9/pc/pmmc.c b/sys/src/9/pc/pmmc.c
index 5e7b1aa79..4452041c5 100644
--- a/sys/src/9/pc/pmmc.c
+++ b/sys/src/9/pc/pmmc.c
@@ -142,7 +142,7 @@ enum {
 	Host2card	= Mwr << 8,
 };
 
-int cmdinfo[64] = {
+static int cmdinfo[64] = {
 [0]  Ixchken,
 [2]  Resp136,
 [3]  Resp48 | Ixchken | Crcchken,
diff --git a/sys/src/9/zynq/emmc.c b/sys/src/9/zynq/emmc.c
index 5f024e52a..f13d68ac3 100644
--- a/sys/src/9/zynq/emmc.c
+++ b/sys/src/9/zynq/emmc.c
@@ -116,7 +116,7 @@ enum {
 	Cmdinhibit	= 1<<0,
 };
 
-int cmdinfo[64] = {
+static int cmdinfo[64] = {
 [0]  Ixchken,
 [2]  Resp136,
 [3]  Resp48 | Ixchken | Crcchken,
@@ -338,7 +338,7 @@ emmccmd(u32int cmd, u32int arg, u32int *resp)
 	return 0;
 }
 
-void
+static void
 emmciosetup(int write, void *buf, int bsize, int bcount)
 {
 	u32int *r;