diff --git a/toonz/sources/common/tvectorimage/tstroke.cpp b/toonz/sources/common/tvectorimage/tstroke.cpp
index c56ac37..fda300f 100644
--- a/toonz/sources/common/tvectorimage/tstroke.cpp
+++ b/toonz/sources/common/tvectorimage/tstroke.cpp
@@ -3343,9 +3343,6 @@ void computeQuadraticsFromCubic(const TThickCubic &cubic, double error,
           assert(areAlmostEqual(
               tsign(cs_sign) * sqrt(cs2),
               tmp / (2 * sqrt(norm2_side0p) * sqrt(norm2_side3p))));
-          assert(!(cs_sign < 0) ||
-                 acos(-sqrt(cs2)) >
-                     10 * M_PI_180);  //  cs_sign < 0 => acos(-sqrt(cs2)) > 10°
           if (cs_sign < 0 || cs2 < 0.969846)  //  cos(10°)^2 = 0.969846
           {  //  limita distanza di intersection: elimina quadratiche "cappio"
              //  (con p1 "lontano")