diff --git a/sys/amd64/amd64/identcpu.c b/sys/amd64/amd64/identcpu.c
index a195fcfb680b..c987bd19ccec 100644
--- a/sys/amd64/amd64/identcpu.c
+++ b/sys/amd64/amd64/identcpu.c
@@ -1343,7 +1343,7 @@ print_transmeta_info()
 #include <vm/vm.h>
 #include <vm/pmap.h>
 
-u_char *elan_mmcr;
+uint16_t *elan_mmcr;
 
 void
 init_AMD_Elan_sc520(void)
diff --git a/sys/amd64/include/md_var.h b/sys/amd64/include/md_var.h
index e75994e5d783..f3c4612b1785 100644
--- a/sys/amd64/include/md_var.h
+++ b/sys/amd64/include/md_var.h
@@ -48,7 +48,7 @@ extern	u_int	cpu_id;
 extern	u_int	cpu_fxsr;
 extern	char	cpu_vendor[];
 extern	u_int	cyrix_did;
-extern	u_char	*elan_mmcr;
+extern	uint16_t *elan_mmcr;
 extern	char	kstack[];
 #ifdef PC98
 extern	int	need_pre_dma_flush;
diff --git a/sys/i386/i386/identcpu.c b/sys/i386/i386/identcpu.c
index a195fcfb680b..c987bd19ccec 100644
--- a/sys/i386/i386/identcpu.c
+++ b/sys/i386/i386/identcpu.c
@@ -1343,7 +1343,7 @@ print_transmeta_info()
 #include <vm/vm.h>
 #include <vm/pmap.h>
 
-u_char *elan_mmcr;
+uint16_t *elan_mmcr;
 
 void
 init_AMD_Elan_sc520(void)
diff --git a/sys/i386/include/md_var.h b/sys/i386/include/md_var.h
index e75994e5d783..f3c4612b1785 100644
--- a/sys/i386/include/md_var.h
+++ b/sys/i386/include/md_var.h
@@ -48,7 +48,7 @@ extern	u_int	cpu_id;
 extern	u_int	cpu_fxsr;
 extern	char	cpu_vendor[];
 extern	u_int	cyrix_did;
-extern	u_char	*elan_mmcr;
+extern	uint16_t *elan_mmcr;
 extern	char	kstack[];
 #ifdef PC98
 extern	int	need_pre_dma_flush;