diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index 9000115..29c0d54 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -947,14 +947,13 @@
 static char *mci_version_string(struct mci *mci)
 {
 	static char version[sizeof("x.xx")];
-	unsigned major, minor, micro;
+	unsigned major, minor;
 
 	major = (mci->version >> 8) & 0xf;
-	minor = (mci->version >> 4) & 0xf;
-	micro = mci->version & 0xf;
+	minor = mci->version & 0xff;
 
-	sprintf(version, "%u.%u", major,
-			micro ? (minor << 4) | micro : minor);
+	/* Shift off last digit of minor if it's 0 */
+	sprintf(version, "%u.%x", major, minor & 0xf ? minor : minor >> 4);
 
 	return version;
 }