diff --git a/gperftools-2.0/src/gperftools/malloc_extension.h b/gperftools-2.0/src/gperftools/malloc_extension.h
index 5bee019..7738c18 100644
--- a/gperftools-2.0/src/gperftools/malloc_extension.h
+++ b/gperftools-2.0/src/gperftools/malloc_extension.h
@@ -54,7 +54,7 @@
 
 // Annoying stuff for windows -- makes sure clients can import these functions
 #ifndef PERFTOOLS_DLL_DECL
-# ifdef _WIN32
+# if defined(_WIN32) && !defined(__MINGW32__)
 #   define PERFTOOLS_DLL_DECL  __declspec(dllimport)
 # else
 #   define PERFTOOLS_DLL_DECL