diff --git a/public/xash3d_mathlib.h b/public/xash3d_mathlib.h
index dcef9384..0156fce1 100644
--- a/public/xash3d_mathlib.h
+++ b/public/xash3d_mathlib.h
@@ -17,7 +17,7 @@ GNU General Public License for more details.
 #define XASH3D_MATHLIB_H
 
 #include <math.h>
-#if HAVE_TGMATH_H
+#if HAVE_TGMATH_H && !__cplusplus
 #include <tgmath.h>
 #endif
 #include <string.h>