diff --git a/build.sh b/build.sh
index a5a1aa3..ac628f8 100755
--- a/build.sh
+++ b/build.sh
@@ -40,7 +40,8 @@ case $SDK_VERSION in
   10.14*) TARGET=darwin18; X86_64H_SUPPORTED=1; I386_SUPPORTED=0; ARM_SUPPORTED=0; NEED_TAPI_SUPPORT=1; OSX_VERSION_MIN_INT=10.9;  ;;
   10.15*) TARGET=darwin19; X86_64H_SUPPORTED=1; I386_SUPPORTED=0; ARM_SUPPORTED=0; NEED_TAPI_SUPPORT=1; OSX_VERSION_MIN_INT=10.9;  ;;
   10.16*) TARGET=darwin20; X86_64H_SUPPORTED=1; I386_SUPPORTED=0; ARM_SUPPORTED=1; NEED_TAPI_SUPPORT=1; OSX_VERSION_MIN_INT=10.9;  ;;
-  11.0*)  TARGET=darwin20; X86_64H_SUPPORTED=1; I386_SUPPORTED=0; ARM_SUPPORTED=1; NEED_TAPI_SUPPORT=1; OSX_VERSION_MIN_INT=10.9;  ;;
+  11.0*)  TARGET=darwin20.1; X86_64H_SUPPORTED=1; I386_SUPPORTED=0; ARM_SUPPORTED=1; NEED_TAPI_SUPPORT=1; OSX_VERSION_MIN_INT=10.9;  ;;
+  11.1*)  TARGET=darwin20.2; X86_64H_SUPPORTED=1; I386_SUPPORTED=0; ARM_SUPPORTED=1; NEED_TAPI_SUPPORT=1; OSX_VERSION_MIN_INT=10.9;  ;;
  *) echo "Unsupported SDK"; exit 1 ;;
 esac
 
diff --git a/wrapper/target.cpp b/wrapper/target.cpp
index c4e1958..46cc74d 100644
--- a/wrapper/target.cpp
+++ b/wrapper/target.cpp
@@ -71,12 +71,14 @@ OSVersion Target::getSDKOSNum() const {
     if (target.size() < 7)
       return OSVersion();
 
-    int n = atoi(target.c_str() + 6);
+    double n = atof(target.c_str() + 6);
 
-    if (n >= 20)
-      return OSVersion(11, n - 20);
-    else
-      return OSVersion(10, 4 + (n - 8));
+    if (n >= 20.0f) {
+      n = (((n - 20.0) * 10.0) - 1.0) + 0.1;
+      return OSVersion(11, (int)n);
+    } else {
+      return OSVersion(10, (int)n - 4);
+    }
   }
 }