diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h
index d3f6caa936b02fb81b7e974504f0898c9cfca51b..68e20ff9aa9bbea04e2daf6e9f2d8bd16e615a1b 100644
--- a/arch/sh/include/asm/ptrace.h
+++ b/arch/sh/include/asm/ptrace.h
@@ -9,7 +9,7 @@
 struct pt_regs {
 	unsigned long long pc;
 	unsigned long long sr;
-	unsigned long long syscall_nr;
+	long long syscall_nr;
 	unsigned long long regs[63];
 	unsigned long long tregs[8];
 	unsigned long long pad[2];