diff --git a/sys/arm/arm/identcpu-v6.c b/sys/arm/arm/identcpu-v6.c
index 567f576826ee..34663dfa51e6 100644
--- a/sys/arm/arm/identcpu-v6.c
+++ b/sys/arm/arm/identcpu-v6.c
@@ -55,7 +55,7 @@ SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD | CTLFLAG_CAPRD,
 	machine, 0, "Machine class");
 
 static char cpu_model[64];
-SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
+SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD | CTLFLAG_CAPRD,
     cpu_model, sizeof(cpu_model), "Machine model");
 
 static char hw_buf[81];
diff --git a/sys/arm64/arm64/identcpu.c b/sys/arm64/arm64/identcpu.c
index e7657e3aecf8..7cdcc9dfcb56 100644
--- a/sys/arm64/arm64/identcpu.c
+++ b/sys/arm64/arm64/identcpu.c
@@ -108,7 +108,7 @@ SYSCTL_PROC(_hw, HW_MACHINE, machine, CTLTYPE_STRING | CTLFLAG_RD |
 	 "Machine class");
 
 static char cpu_model[64];
-SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
+SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD | CTLFLAG_CAPRD,
 	cpu_model, sizeof(cpu_model), "Machine model");
 
 #define	MAX_CACHES	8	/* Maximum number of caches supported
diff --git a/sys/powerpc/powerpc/cpu.c b/sys/powerpc/powerpc/cpu.c
index 518623af9de4..19907e3973e7 100644
--- a/sys/powerpc/powerpc/cpu.c
+++ b/sys/powerpc/powerpc/cpu.c
@@ -239,7 +239,7 @@ static void	cpu_6xx_print_cacheinfo(u_int, uint16_t);
 static int	cpu_feature_bit(SYSCTL_HANDLER_ARGS);
 
 static char model[64];
-SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, "");
+SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD | CTLFLAG_CAPRD, model, 0, "");
 
 static const struct cputab	*cput;
 
diff --git a/sys/x86/x86/identcpu.c b/sys/x86/x86/identcpu.c
index 7fa35bd50244..3163053a123f 100644
--- a/sys/x86/x86/identcpu.c
+++ b/sys/x86/x86/identcpu.c
@@ -158,7 +158,7 @@ SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD | CTLFLAG_CAPRD,
 #endif
 
 char cpu_model[128];
-SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD | CTLFLAG_MPSAFE,
+SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
     cpu_model, 0, "Machine model");
 
 static int hw_clockrate;