diff --git a/src/x86/offsets.h b/src/x86/offsets.h
index 81f69f90..f06ffd2d 100644
--- a/src/x86/offsets.h
+++ b/src/x86/offsets.h
@@ -83,28 +83,28 @@
 #define LINUX_FPSTATE_XMM6_OFF		0x170
 #define LINUX_FPSTATE_XMM7_OFF		0x180
 
-#define FREEBSD_UC_MCONTEXT_EAX_OFF	0x11
-#define FREEBSD_UC_MCONTEXT_EBX_OFF	0x11
-#define FREEBSD_UC_MCONTEXT_ECX_OFF	0x11
-#define FREEBSD_UC_MCONTEXT_EDX_OFF	0x11
-#define FREEBSD_UC_MCONTEXT_EDI_OFF	0x11
-#define FREEBSD_UC_MCONTEXT_ESI_OFF	0x11
-#define FREEBSD_UC_MCONTEXT_EBP_OFF	0x11
-#define FREEBSD_UC_MCONTEXT_OFF_EIP	0x11
-#define FREEBSD_UC_MCONTEXT_OFF_ESP	0x11
-#define FREEBSD_UC_MCONTEXT_OFF_FS	0x11
-#define FREEBSD_UC_MCONTEXT_OFF_GS	0x11
-#define FREEBSD_UC_MCONTEXT_OFF_DS	0x11
-#define FREEBSD_UC_MCONTEXT_OFF_ES	0x11
-#define FREEBSD_UC_MCONTEXT_OFF_SS	0x11
-#define FREEBSD_UC_MCONTEXT_OFF_CS	0x11
-#define FREEBSD_UC_MCONTEXT_OFF_EFLAGS	0x11
-#define FREEBSD_UC_MCONTEXT_OWNEDFP	0x11
-#define FREEBSD_UC_MCONTEXT_FPFORMAT	0x11
-#define FREEBSD_UC_MCONTEXT_FPSTATE	0x11
-#define FREEBSD_UC_MCONTEXT_MC_LEN	0x11
+#define FREEBSD_UC_MCONTEXT_EAX_OFF	0x40
+#define FREEBSD_UC_MCONTEXT_EBX_OFF	0x34
+#define FREEBSD_UC_MCONTEXT_ECX_OFF	0x3c
+#define FREEBSD_UC_MCONTEXT_EDX_OFF	0x38
+#define FREEBSD_UC_MCONTEXT_EDI_OFF	0x24
+#define FREEBSD_UC_MCONTEXT_ESI_OFF	0x28
+#define FREEBSD_UC_MCONTEXT_EBP_OFF	0x2c
+#define FREEBSD_UC_MCONTEXT_OFF_EIP	0x4c
+#define FREEBSD_UC_MCONTEXT_OFF_ESP	0x58
+#define FREEBSD_UC_MCONTEXT_OFF_FS	0x18
+#define FREEBSD_UC_MCONTEXT_OFF_GS	0x14
+#define FREEBSD_UC_MCONTEXT_OFF_DS	0x20
+#define FREEBSD_UC_MCONTEXT_OFF_ES	0x1c
+#define FREEBSD_UC_MCONTEXT_OFF_SS	0x5c
+#define FREEBSD_UC_MCONTEXT_OFF_CS	0x50
+#define FREEBSD_UC_MCONTEXT_OFF_EFLAGS	0x54
+#define FREEBSD_UC_MCONTEXT_OWNEDFP	0x68
+#define FREEBSD_UC_MCONTEXT_FPFORMAT	0x64
+#define FREEBSD_UC_MCONTEXT_FPSTATE	0x70
+#define FREEBSD_UC_MCONTEXT_MC_LEN	0x60
 
-#define FREEBSD_UC_MCONTEXT_MC_LEN_VAL	0x11
+#define FREEBSD_UC_MCONTEXT_MC_LEN_VAL	0x280
 #define FREEBSD_UC_MCONTEXT_FPOWNED_FPU	0x20001
 #define FREEBSD_UC_MCONTEXT_FPFMT_387	0x10001
 #define FREEBSD_UC_MCONTEXT_FPFMT_XMM	0x10002