diff --git a/sys/compat/linux/linux_common.c b/sys/compat/linux/linux_common.c
--- a/sys/compat/linux/linux_common.c
+++ b/sys/compat/linux/linux_common.c
@@ -52,6 +52,7 @@
 
 	switch(type) {
 	case MOD_LOAD:
+		linux_prison0_init();
 #ifdef INVARIANTS
 		linux_check_errtbl();
 #endif
diff --git a/sys/compat/linux/linux_mib.h b/sys/compat/linux/linux_mib.h
--- a/sys/compat/linux/linux_mib.h
+++ b/sys/compat/linux/linux_mib.h
@@ -53,10 +53,6 @@
 #define	LINUX_KERNVER(a,b,c)	(((a) << 16) + ((b) << 8) + (c))
 #define	LINUX_VERSION_CODE	LINUX_KERNVER(LINUX_KVERSION,		\
 				    LINUX_KPATCHLEVEL, LINUX_KSUBLEVEL)
-#define	LINUX_KERNVERSTR(x)	#x
-#define	LINUX_XKERNVERSTR(x)	LINUX_KERNVERSTR(x)
-#define	LINUX_VERSION_STR	LINUX_XKERNVERSTR(LINUX_KVERSION.LINUX_KPATCHLEVEL.LINUX_KSUBLEVEL)
-
 #define	LINUX_KERNVER_2004000	LINUX_KERNVER(2,4,0)
 #define	LINUX_KERNVER_2006039	LINUX_KERNVER(2,6,39)
 #define	LINUX_KERNVER_5004000	LINUX_KERNVER(5,4,0)
@@ -73,5 +69,6 @@
 
 struct image_params;
 int linux_setid_allowed_query(struct thread *td, struct image_params *imgp);
+void linux_prison0_init(void);
 
 #endif /* _LINUX_MIB_H_ */
diff --git a/sys/compat/linux/linux_mib.c b/sys/compat/linux/linux_mib.c
--- a/sys/compat/linux/linux_mib.c
+++ b/sys/compat/linux/linux_mib.c
@@ -29,6 +29,7 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <sys/ctype.h>
 #include <sys/param.h>
 #include <sys/lock.h>
 #include <sys/malloc.h>
@@ -49,7 +50,7 @@
 
 static struct linux_prison lprison0 = {
 	.pr_osname =		"Linux",
-	.pr_osrelease =		LINUX_VERSION_STR,
+	.pr_osrelease =		"" /* filled in by linux_prison0_init() */,
 	.pr_oss_version =	0x030600,
 	.pr_osrel =		LINUX_VERSION_CODE
 };
@@ -585,3 +586,16 @@
 
 	return (0);
 }
+
+void
+linux_prison0_init(void)
+{
+	char *p;
+
+	snprintf(lprison0.pr_osrelease, sizeof(lprison0.pr_osrelease),
+	    "%d.%d.%d-%s%s", LINUX_KVERSION, LINUX_KPATCHLEVEL, LINUX_KSUBLEVEL,
+	    ostype, osrelease);
+
+	for (p = lprison0.pr_osrelease; *p != '\0'; p++)
+		*p = tolower(*p);
+}
diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c
--- a/sys/compat/linux/linux_misc.c
+++ b/sys/compat/linux/linux_misc.c
@@ -425,7 +425,7 @@
 	struct l_new_utsname utsname;
 	char osname[LINUX_MAX_UTSNAME];
 	char osrelease[LINUX_MAX_UTSNAME];
-	char *p;
+	char *p, *hash;
 
 	linux_get_osname(td, osname);
 	linux_get_osrelease(td, osrelease);
@@ -435,7 +435,10 @@
 	getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
 	getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME);
 	strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
-	strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
+	/* Skip everything before '#'; in Linux it belongs in osrelease. */
+	hash = strchr(version, '#');
+	strlcpy(utsname.version, hash != NULL ? hash : version,
+	    LINUX_MAX_UTSNAME);
 	for (p = utsname.version; *p != '\0'; ++p)
 		if (*p == '\n') {
 			*p = '\0';