diff --git a/usr.bin/gcore/elf32core.c b/usr.bin/gcore/elf32core.c
index 29fb7d3608b4..196ba9f1cec0 100644
--- a/usr.bin/gcore/elf32core.c
+++ b/usr.bin/gcore/elf32core.c
@@ -5,9 +5,6 @@
 
 #define __ELF_WORD_SIZE 32
 #define _MACHINE_ELF_WANT_32BIT
-#define	_WANT_LWPINFO32
-
-#include <sys/procfs.h>
 
 #define	ELFCORE_COMPAT_32	1
 #include "elfcore.c"