diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c
index c5c4e3bf65..692fa43c4d 100644
--- a/libavfilter/vf_v360.c
+++ b/libavfilter/vf_v360.c
@@ -4161,8 +4161,8 @@ static void fov_from_dfov(int format, float d_fov, float w, float h, float *h_fo
             const float d = 0.5f * hypotf(w, h);
             const float l = sinf(d_fov * M_PI / 360.f) / d;
 
-            *h_fov = asinf(w * 0.5 * l) * 360.f / M_PI;
-            *v_fov = asinf(h * 0.5 * l) * 360.f / M_PI;
+            *h_fov = asinf(w * 0.5f * l) * 360.f / M_PI;
+            *v_fov = asinf(h * 0.5f * l) * 360.f / M_PI;
 
             if (d_fov > 180.f) {
                 *h_fov = 180.f - *h_fov;