diff --git a/Signal/src/util/NumberUtil.m b/Signal/src/util/NumberUtil.m
index f3447b325..1ac164a94 100644
--- a/Signal/src/util/NumberUtil.m
+++ b/Signal/src/util/NumberUtil.m
@@ -46,10 +46,18 @@
 
 + (double)clamp:(double)value toMin:(double)min andMax:(double)max {
     ows_require(min <= max);
-    if (value < min)
+    if (isnan(value)) {
+        return max;
+    }
+
+    if (value < min) {
         return min;
-    if (value > max)
+    }
+
+    if (value > max) {
         return max;
+    }
+
     return value;
 }