diff --git a/lib/Arch/X86/Runtime/Instructions.cpp b/lib/Arch/X86/Runtime/Instructions.cpp
index a3b94006..a06b0d66 100644
--- a/lib/Arch/X86/Runtime/Instructions.cpp
+++ b/lib/Arch/X86/Runtime/Instructions.cpp
@@ -191,7 +191,7 @@ DEF_HELPER(SquareRoot32, float32_t src_float)->float32_t {
       uint32_t indef_qnan = 0xFFC00000U;
       square_root = reinterpret_cast<float32_t &>(indef_qnan);
     } else {
-      square_root = std::sqrt(src_float);
+      square_root = __builtin_sqrtf(src_float);
     }
   }
 
diff --git a/lib/Arch/X86/Semantics/SSE.cpp b/lib/Arch/X86/Semantics/SSE.cpp
index 33fd9469..d70615e3 100644
--- a/lib/Arch/X86/Semantics/SSE.cpp
+++ b/lib/Arch/X86/Semantics/SSE.cpp
@@ -1794,7 +1794,7 @@ DEF_HELPER(SquareRoot64, float64_t src_float)->float64_t {
       uint64_t indef_qnan = 0xFFF8000000000000ULL;
       square_root = reinterpret_cast<float64_t &>(indef_qnan);
     } else {
-      square_root = std::sqrt(src_float);
+      square_root = __builtin_sqrt(src_float);
     }
   }