diff --git a/src/openpose/calibration/cameraParameterEstimation.cpp b/src/openpose/calibration/cameraParameterEstimation.cpp
index 46b7bbdc845f95ab71d927217e65cc42c05a6cb5..4cb1c96441f7d39d8e7a557fa1c4b950c40397ed 100644
--- a/src/openpose/calibration/cameraParameterEstimation.cpp
+++ b/src/openpose/calibration/cameraParameterEstimation.cpp
@@ -196,7 +196,7 @@ namespace op
         try
         {
             // Return angle in range [0,2pi)
-            return std::fmod(angle, 360);    // floating-point remainder
+            return std::fmod(angle + 2 * PI, 2 * PI);    // floating-point remainder
             // double result{angle};
 
             // Return angle in range [0,2pi)