diff --git a/sys/amd64/amd64/tsc.c b/sys/amd64/amd64/tsc.c
index 29c895834074..52e19325cdf0 100644
--- a/sys/amd64/amd64/tsc.c
+++ b/sys/amd64/amd64/tsc.c
@@ -1203,7 +1203,7 @@ sysctl_machdep_i8254_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_i8254_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_i8254_freq, "IU", "");
 
 static int
 sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
@@ -1223,7 +1223,7 @@ sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, tsc_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_tsc_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_tsc_freq, "IU", "");
 
 static unsigned
 i8254_get_timecount(struct timecounter *tc)
diff --git a/sys/amd64/isa/clock.c b/sys/amd64/isa/clock.c
index 29c895834074..52e19325cdf0 100644
--- a/sys/amd64/isa/clock.c
+++ b/sys/amd64/isa/clock.c
@@ -1203,7 +1203,7 @@ sysctl_machdep_i8254_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_i8254_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_i8254_freq, "IU", "");
 
 static int
 sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
@@ -1223,7 +1223,7 @@ sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, tsc_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_tsc_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_tsc_freq, "IU", "");
 
 static unsigned
 i8254_get_timecount(struct timecounter *tc)
diff --git a/sys/i386/i386/tsc.c b/sys/i386/i386/tsc.c
index 29c895834074..52e19325cdf0 100644
--- a/sys/i386/i386/tsc.c
+++ b/sys/i386/i386/tsc.c
@@ -1203,7 +1203,7 @@ sysctl_machdep_i8254_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_i8254_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_i8254_freq, "IU", "");
 
 static int
 sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
@@ -1223,7 +1223,7 @@ sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, tsc_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_tsc_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_tsc_freq, "IU", "");
 
 static unsigned
 i8254_get_timecount(struct timecounter *tc)
diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c
index 29c895834074..52e19325cdf0 100644
--- a/sys/i386/isa/clock.c
+++ b/sys/i386/isa/clock.c
@@ -1203,7 +1203,7 @@ sysctl_machdep_i8254_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_i8254_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_i8254_freq, "IU", "");
 
 static int
 sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
@@ -1223,7 +1223,7 @@ sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, tsc_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_tsc_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_tsc_freq, "IU", "");
 
 static unsigned
 i8254_get_timecount(struct timecounter *tc)
diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c
index 29c895834074..52e19325cdf0 100644
--- a/sys/isa/atrtc.c
+++ b/sys/isa/atrtc.c
@@ -1203,7 +1203,7 @@ sysctl_machdep_i8254_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_i8254_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_i8254_freq, "IU", "");
 
 static int
 sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
@@ -1223,7 +1223,7 @@ sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_machdep, OID_AUTO, tsc_freq, CTLTYPE_INT | CTLFLAG_RW,
-    0, sizeof(u_int), sysctl_machdep_tsc_freq, "I", "");
+    0, sizeof(u_int), sysctl_machdep_tsc_freq, "IU", "");
 
 static unsigned
 i8254_get_timecount(struct timecounter *tc)