diff --git a/Changes b/Changes
index ad96861a0..756dd7f90 100644
--- a/Changes
+++ b/Changes
@@ -12,6 +12,8 @@ The contributors that suggested a given feature are shown in []. Thanks!
 
 ****  Fix $value$plus$args missing verilated_heavy.h. [Yi-Chung Chen]
 
+****  Fix MSVC compile error, bug1406. [Benjamin Gartner]
+
 
 * Verilator 4.010 2019-01-27
 
diff --git a/include/verilated.cpp b/include/verilated.cpp
index ab406b9fb..4277a555a 100644
--- a/include/verilated.cpp
+++ b/include/verilated.cpp
@@ -33,7 +33,7 @@
 #include <cctype>
 #include <sys/stat.h>  // mkdir
 
-#if defined(WIN32) || defined(__MINGW32__)
+#if defined(_WIN32) || defined(__MINGW32__)
 # include <direct.h>  // mkdir
 #endif
 
diff --git a/src/V3Os.cpp b/src/V3Os.cpp
index 9ad11e905..511ace89c 100644
--- a/src/V3Os.cpp
+++ b/src/V3Os.cpp
@@ -36,7 +36,7 @@
 #include <sys/time.h>
 #include <sys/types.h>
 
-#if defined(WIN32) || defined(__MINGW32__)
+#if defined(_WIN32) || defined(__MINGW32__)
 # include <direct.h>  // mkdir
 #endif