diff --git a/Changes b/Changes
index 18dc6825e..d8decbde6 100644
--- a/Changes
+++ b/Changes
@@ -5,6 +5,8 @@ indicates the contributor was also the author of the fix; Thanks!
 
 * Verilator 3.875 devel
 
+****  Fix MinGW compiler error, bug929. [Hans Tichelaar]
+
 * Verilator 3.874 2015-06-06
 
 ***   Add pkg-config .pc file, bug919. [Stefan Wallentowitz]
diff --git a/src/V3Os.cpp b/src/V3Os.cpp
index 37b769a6a..d7031e096 100644
--- a/src/V3Os.cpp
+++ b/src/V3Os.cpp
@@ -55,7 +55,7 @@ void V3Os::setenvStr(const string& envvar, const string& value, const string& wh
     } else {
 	UINFO(1,"export "<<envvar<<"="<<value<<endl);
     }
-#if defined(_BSD_SOURCE) || (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L)
+#if !defined(__MINGW32__) && (defined(_BSD_SOURCE) || (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L))
     setenv(envvar.c_str(),value.c_str(),true);
 #else
     //setenv() replaced by putenv() in MinGW/Solaris environment. Prototype is different