diff --git a/.gitignore b/.gitignore
index f0ccae9..6b869f7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,6 @@ build
 
 # Visual Studio build directory
 build_vs2013
+
+# Test Files
+test*.txt
diff --git a/src/turbo_linecount.h b/src/turbo_linecount.h
index 6f6fa56..0919344 100644
--- a/src/turbo_linecount.h
+++ b/src/turbo_linecount.h
@@ -33,7 +33,7 @@
 
 ////////////// Platform specific
 
-#if defined(_APPLE__) || defined(__linux__) || defined(__CYGWIN__) 
+#if defined(__APPLE__) || defined(__linux__) || defined(__CYGWIN__) 
 #define TLC_COMPATIBLE_UNIX 1
 #endif
 
@@ -49,7 +49,14 @@ typedef errno_t tlc_error_t;
 #include<pthread.h>
 #define _T(x) x
 #define TCHAR char
+
+#ifdef _ERRNO_T
+typedef errno_t tlc_error_t;
+#elif defined(__error_t_defined)
 typedef error_t tlc_error_t;
+#else
+typedef int tlc_error_t;
+#endif
 
 #else
 #error Unsupported operating system.