diff --git a/README.md b/README.md
index cef7123..d1f7a1e 100755
--- a/README.md
+++ b/README.md
@@ -167,7 +167,7 @@ However, there are several ways to override the default value:
 \>= 10.9 also defaults to `libc++` instead of `libstdc++`, this behavior  
 can be overriden by explicitly passing `-stdlib=libstdc++` to clang.
 
-x86\_64h defaults to `Mac OS X 10.9` and requires clang 3.5+.  
+x86\_64h defaults to `Mac OS X 10.8` and requires clang 3.5+.  
 x86\_64h = x86\_64 with optimizations for the Intel Haswell Architecture.
 
 ### LICENSE: ####
diff --git a/wrapper/target.cpp b/wrapper/target.cpp
index 71cbfe8..efac3bb 100644
--- a/wrapper/target.cpp
+++ b/wrapper/target.cpp
@@ -381,7 +381,7 @@ bool Target::setup() {
 
   if (!OSNum.Num()) {
     if (haveArch(Arch::x86_64h)) {
-      OSNum = OSVersion(10, 9); // Default to 10.9 for x86_64h
+      OSNum = OSVersion(10, 8); // Default to 10.8 for x86_64h
       if (SDKOSNum < OSNum) {
         std::cerr << getArchName(arch) << " requires the SDK from "
                   << OSNum.Str() << " (or later)" << std::endl;