diff --git a/src/cairo-arc.c b/src/cairo-arc.c
index 1c891d1a0..010b9c1a7 100644
--- a/src/cairo-arc.c
+++ b/src/cairo-arc.c
@@ -188,6 +188,9 @@ _cairo_arc_in_direction (cairo_t	  *cr,
     if (cairo_status (cr))
         return;
 
+    if (! ISFINITE (angle_max) || ! ISFINITE (angle_min))
+        return;
+
     assert (angle_max >= angle_min);
 
     if (angle_max - angle_min > 2 * M_PI * MAX_FULL_CIRCLES) {