diff --git a/common/include/sys/procfs.h b/common/include/sys/procfs.h
index 4ec05d2fd..d77891250 100644
--- a/common/include/sys/procfs.h
+++ b/common/include/sys/procfs.h
@@ -11,6 +11,7 @@
 #define _SYS_PROCFS_H_
 
 #include <sys/param.h>
+#include <sys/elf_core.h>
 #include <i386/stackframe.h>
 
 /*