diff --git a/public/xash3d_mathlib.h b/public/xash3d_mathlib.h
index 12c246b57..bed5006e1 100644
--- a/public/xash3d_mathlib.h
+++ b/public/xash3d_mathlib.h
@@ -73,7 +73,7 @@ GNU General Public License for more details.
 
 #define Q_min( a, b )	(((a) < (b)) ? (a) : (b))
 #define Q_max( a, b )	(((a) > (b)) ? (a) : (b))
-#define Q_equal_e( a, b, e ) (((a) > ((b) - (e))) && ((a) < ((b) + (e))))
+#define Q_equal_e( a, b, e ) (((a) >= ((b) - (e))) && ((a) <= ((b) + (e))))
 #define Q_equal( a, b ) Q_equal_e( a, b, EQUAL_EPSILON )
 #define Q_recip( a )	((float)(1.0f / (float)(a)))
 #define Q_floor( a )	((float)(int)(a))