diff --git a/sys/amd64/amd64/identcpu.c b/sys/amd64/amd64/identcpu.c
index 9e6f5deb1036..cd0c72eda1d8 100644
--- a/sys/amd64/amd64/identcpu.c
+++ b/sys/amd64/amd64/identcpu.c
@@ -294,7 +294,7 @@ printcpuinfo(void)
 				"\030<s23>"	/* Same */
 				"\031<s24>"	/* Same */
 				"\032FFXSR"	/* Fast FXSAVE/FXRSTOR */
-				"\033<b26>"	/* Undefined */
+				"\033Page1GB"	/* 1-GB large page support */
 				"\034RDTSCP"	/* RDTSCP */
 				"\035<b28>"	/* Undefined */
 				"\036LM"	/* 64 bit long mode */
diff --git a/sys/amd64/include/specialreg.h b/sys/amd64/include/specialreg.h
index 76297be3ff73..e25ed7b9a451 100644
--- a/sys/amd64/include/specialreg.h
+++ b/sys/amd64/include/specialreg.h
@@ -134,6 +134,7 @@
 #define	AMDID_NX	0x00100000
 #define	AMDID_EXT_MMX	0x00400000
 #define	AMDID_FFXSR	0x01000000
+#define	AMDID_PAGE1GB	0x04000000
 #define	AMDID_RDTSCP	0x08000000
 #define	AMDID_LM	0x20000000
 #define	AMDID_EXT_3DNOW	0x40000000