diff --git a/src/arch/x86/mod.rs b/src/arch/x86/mod.rs
index d17b2fa..7441bdc 100644
--- a/src/arch/x86/mod.rs
+++ b/src/arch/x86/mod.rs
@@ -24,7 +24,7 @@ macro_rules! swap {
          : "eax",  "ebx",  "ecx",  "edx",  "esi",  "edi", //"ebp",  "esp",
            "mmx0", "mmx1", "mmx2", "mmx3", "mmx4", "mmx5", "mmx6", "mmx7",
            "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7",
-           "cc"
+           "cc", "fpsr", "eflags"
          : "volatile")
   };
 }
diff --git a/src/arch/x86_64/mod.rs b/src/arch/x86_64/mod.rs
index 3706383..0128691 100644
--- a/src/arch/x86_64/mod.rs
+++ b/src/arch/x86_64/mod.rs
@@ -27,7 +27,7 @@ macro_rules! swap {
            "xmm8",  "xmm9",  "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15",
            "xmm16", "xmm17", "xmm18", "xmm19", "xmm20", "xmm21", "xmm22", "xmm23",
            "xmm24", "xmm25", "xmm26", "xmm27", "xmm28", "xmm29", "xmm30", "xmm31"
-           "cc"
+           "cc", "fpsr", "eflags"
          : "volatile");
   }
 }