diff --git a/target/m68k/helper.c b/target/m68k/helper.c
index 014657c..cad4083 100644
--- a/target/m68k/helper.c
+++ b/target/m68k/helper.c
@@ -109,8 +109,8 @@
 {
     if (n < 8) {
         int len = gdb_get_reg16(mem_buf, env->fregs[n].l.upper);
-        len += gdb_get_reg16(mem_buf + len, 0);
-        len += gdb_get_reg64(mem_buf + len, env->fregs[n].l.lower);
+        len += gdb_get_reg16(mem_buf, 0);
+        len += gdb_get_reg64(mem_buf, env->fregs[n].l.lower);
         return len;
     }
     switch (n) {