diff --git a/pstack.c b/pstack.c
index c6329d0..dc89d46 100644
--- a/pstack.c
+++ b/pstack.c
@@ -114,12 +114,14 @@
 #endif /* x86-{32,64} */
 #define NEXT_FRAME_POINTER_ADDR(fp) (fp)
 #define NEXT_PROGRAM_COUNTER_ADDR(fp) ((fp) + __SIZEOF_POINTER__)
+#define DECLARE_REGS_STRUCT(regs) struct user_regs_struct regs
 #elif defined(__ARMEL__) /* armel */
 #define ELF_MACHINE EM_ARM
 #define PROGRAM_COUNTER(regs) (regs.ARM_pc)
 #define FRAME_POINTER(regs) (regs.ARM_fp)
 #define NEXT_FRAME_POINTER_ADDR(fp) ((fp) - __SIZEOF_POINTER__)
 #define NEXT_PROGRAM_COUNTER_ADDR(fp) (fp)
+#define DECLARE_REGS_STRUCT(regs) struct user_regs regs
 #elif defined(__ppc64__) || defined(__alpha__) || defined(__ia64__) || defined(s390x__)
 #error Not (yet) supported architecture, patches welcomes :-)
 #else
@@ -643,7 +645,7 @@ static int crawl(int pid)
 {
   unsigned long pc, fp, nextfp, nargs, i, arg;
   int ret, error_occured = 0;
-  struct pt_regs regs;
+  DECLARE_REGS_STRUCT(regs);
 
   errno = 0;