diff --git a/src/platform_cygwin.cc b/src/platform_cygwin.cc
index 4fcade8bce..d6ad3e1ff5 100644
--- a/src/platform_cygwin.cc
+++ b/src/platform_cygwin.cc
@@ -14,11 +14,11 @@ static char *process_title = NULL;
 
 // Does the about the same as perror(), but for windows api functions
 static void _winapi_perror(const char* prefix = NULL) {
-  DWORD errno = GetLastError();
+  DWORD errorno = GetLastError();
   char *errmsg;
 
   FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
-                NULL, errno, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errmsg, 0, NULL);
+                NULL, errorno, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errmsg, 0, NULL);
 
   // FormatMessage messages include a newline character
 
diff --git a/src/platform_win32.cc b/src/platform_win32.cc
index 11659e038c..b828cc5a0b 100644
--- a/src/platform_win32.cc
+++ b/src/platform_win32.cc
@@ -15,11 +15,11 @@ static char *process_title = NULL;
 
 // Does the about the same as perror(), but for windows api functions
 void winapi_perror(const char* prefix = NULL) {
-  DWORD errno = GetLastError();
+  DWORD errorno = GetLastError();
   char *errmsg;
 
   FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
-                NULL, errno, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errmsg, 0, NULL);
+                NULL, errorno, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errmsg, 0, NULL);
 
   // FormatMessage messages include a newline character