diff --git a/unix/linux/types.go b/unix/linux/types.go
index d3bf24a..2978c51 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -163,10 +163,8 @@
 typedef struct user_regs PtraceRegs;
 #elif defined(__aarch64__)
 typedef struct user_pt_regs PtraceRegs;
-#elif defined(__powerpc64__)
+#elif defined(__mips__) || defined(__powerpc64__)
 typedef struct pt_regs PtraceRegs;
-#elif defined(__mips__)
-typedef struct user PtraceRegs;
 #elif defined(__s390x__)
 typedef struct _user_regs_struct PtraceRegs;
 #elif defined(__sparc__)
diff --git a/unix/syscall_linux_mips64x.go b/unix/syscall_linux_mips64x.go
index 1f7b613..73318e5 100644
--- a/unix/syscall_linux_mips64x.go
+++ b/unix/syscall_linux_mips64x.go
@@ -183,9 +183,9 @@
 	s.Blocks = st.Blocks
 }
 
-func (r *PtraceRegs) PC() uint64 { return r.Regs[64] }
+func (r *PtraceRegs) PC() uint64 { return r.Epc }
 
-func (r *PtraceRegs) SetPC(pc uint64) { r.Regs[64] = pc }
+func (r *PtraceRegs) SetPC(pc uint64) { r.Epc = pc }
 
 func (iov *Iovec) SetLen(length int) {
 	iov.Len = uint64(length)
diff --git a/unix/syscall_linux_mipsx.go b/unix/syscall_linux_mipsx.go
index be77d24..b83d93f 100644
--- a/unix/syscall_linux_mipsx.go
+++ b/unix/syscall_linux_mipsx.go
@@ -211,9 +211,9 @@
 	return setrlimit(resource, &rl)
 }
 
-func (r *PtraceRegs) PC() uint64 { return uint64(r.Regs[64]) }
+func (r *PtraceRegs) PC() uint64 { return r.Epc }
 
-func (r *PtraceRegs) SetPC(pc uint64) { r.Regs[64] = uint32(pc) }
+func (r *PtraceRegs) SetPC(pc uint64) { r.Epc = pc }
 
 func (iov *Iovec) SetLen(length int) {
 	iov.Len = uint32(length)
diff --git a/unix/ztypes_linux_mips.go b/unix/ztypes_linux_mips.go
index d04ca4c..f97268c 100644
--- a/unix/ztypes_linux_mips.go
+++ b/unix/ztypes_linux_mips.go
@@ -568,17 +568,13 @@
 const SizeofInotifyEvent = 0x10
 
 type PtraceRegs struct {
-	Regs        [109]uint32
-	U_tsize     uint32
-	U_dsize     uint32
-	U_ssize     uint32
-	Start_code  uint32
-	Start_data  uint32
-	Start_stack uint32
-	Signal      int32
-	U_ar0       *byte
-	Magic       uint32
-	U_comm      [32]int8
+	Regs     [32]uint64
+	Lo       uint64
+	Hi       uint64
+	Epc      uint64
+	Badvaddr uint64
+	Status   uint64
+	Cause    uint64
 }
 
 type FdSet struct {
diff --git a/unix/ztypes_linux_mips64.go b/unix/ztypes_linux_mips64.go
index 60b83a1..8d06208 100644
--- a/unix/ztypes_linux_mips64.go
+++ b/unix/ztypes_linux_mips64.go
@@ -570,17 +570,13 @@
 const SizeofInotifyEvent = 0x10
 
 type PtraceRegs struct {
-	Regs        [102]uint64
-	U_tsize     uint64
-	U_dsize     uint64
-	U_ssize     uint64
-	Start_code  uint64
-	Start_data  uint64
-	Start_stack uint64
-	Signal      int64
-	U_ar0       uint64
-	Magic       uint64
-	U_comm      [32]int8
+	Regs     [32]uint64
+	Lo       uint64
+	Hi       uint64
+	Epc      uint64
+	Badvaddr uint64
+	Status   uint64
+	Cause    uint64
 }
 
 type FdSet struct {
diff --git a/unix/ztypes_linux_mips64le.go b/unix/ztypes_linux_mips64le.go
index 9e9c680..b1fbe71 100644
--- a/unix/ztypes_linux_mips64le.go
+++ b/unix/ztypes_linux_mips64le.go
@@ -570,17 +570,13 @@
 const SizeofInotifyEvent = 0x10
 
 type PtraceRegs struct {
-	Regs        [102]uint64
-	U_tsize     uint64
-	U_dsize     uint64
-	U_ssize     uint64
-	Start_code  uint64
-	Start_data  uint64
-	Start_stack uint64
-	Signal      int64
-	U_ar0       uint64
-	Magic       uint64
-	U_comm      [32]int8
+	Regs     [32]uint64
+	Lo       uint64
+	Hi       uint64
+	Epc      uint64
+	Badvaddr uint64
+	Status   uint64
+	Cause    uint64
 }
 
 type FdSet struct {
diff --git a/unix/ztypes_linux_mipsle.go b/unix/ztypes_linux_mipsle.go
index 482b48f..b634e3c 100644
--- a/unix/ztypes_linux_mipsle.go
+++ b/unix/ztypes_linux_mipsle.go
@@ -568,17 +568,13 @@
 const SizeofInotifyEvent = 0x10
 
 type PtraceRegs struct {
-	Regs        [109]uint32
-	U_tsize     uint32
-	U_dsize     uint32
-	U_ssize     uint32
-	Start_code  uint32
-	Start_data  uint32
-	Start_stack uint32
-	Signal      int32
-	U_ar0       *byte
-	Magic       uint32
-	U_comm      [32]int8
+	Regs     [32]uint64
+	Lo       uint64
+	Hi       uint64
+	Epc      uint64
+	Badvaddr uint64
+	Status   uint64
+	Cause    uint64
 }
 
 type FdSet struct {