diff --git a/uppsrc/Core/parser.cpp b/uppsrc/Core/parser.cpp
index 31fb9f9cf..3a9b6b969 100644
--- a/uppsrc/Core/parser.cpp
+++ b/uppsrc/Core/parser.cpp
@@ -234,8 +234,13 @@ uint64  CParser::ReadNumber64(int base) throw(Error)
 }
 
 #if defined(COMPILER_MINGW)
-_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _clearfp (void);    
-#define SW_OVERFLOW    0x00000004              
+
+extern "C" {
+	_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _clearfp(void);
+}
+
+#define SW_OVERFLOW 0x00000004
+
 #endif
 
 double CParser::ReadDouble() throw(Error)