diff --git a/sys/sys/elf_common.h b/sys/sys/elf_common.h
index 463da3fbc51b..ebe2ee232883 100644
--- a/sys/sys/elf_common.h
+++ b/sys/sys/elf_common.h
@@ -724,6 +724,7 @@ typedef struct {
 #define	NT_PROCSTAT_OSREL	14	/* Procstat osreldate data. */
 #define	NT_PROCSTAT_PSSTRINGS	15	/* Procstat ps_strings data. */
 #define	NT_PROCSTAT_AUXV	16	/* Procstat auxv data. */
+#define	NT_PPC_VMX	0x100	/* PowerPC Altivec/VMX registers */
 #define	NT_X86_XSTATE	0x202	/* x86 XSAVE extended state. */
 
 /* Symbol Binding - ELFNN_ST_BIND - st_info */