diff --git a/src/app/material-timepicker/components/timepicker-face/ngx-material-timepicker-face.component.ts b/src/app/material-timepicker/components/timepicker-face/ngx-material-timepicker-face.component.ts
index e54068f0..d802ff95 100755
--- a/src/app/material-timepicker/components/timepicker-face/ngx-material-timepicker-face.component.ts
+++ b/src/app/material-timepicker/components/timepicker-face/ngx-material-timepicker-face.component.ts
@@ -194,9 +194,9 @@ function roundAngle(angle: number, step: number): number {
 }
 
 function countAngleByCords(x0: number, y0: number, x: number, y: number, currentAngle: number): number {
-    if (y > y0 && x >= x0) {// II quarter
+    if (y >= y0 && x >= x0) {// II quarter
         return 180 - currentAngle;
-    } else if (y > y0 && x < x0) {// III quarter
+    } else if (y >= y0 && x < x0) {// III quarter
         return 180 + currentAngle;
     } else if (y < y0 && x < x0) {// IV quarter
         return 360 - currentAngle;