diff --git a/src/main/java/org/apache/commons/lang3/BitField.java b/src/main/java/org/apache/commons/lang3/BitField.java
index 824d24212..65b465e91 100644
--- a/src/main/java/org/apache/commons/lang3/BitField.java
+++ b/src/main/java/org/apache/commons/lang3/BitField.java
@@ -84,16 +84,7 @@ public class BitField {
      */
     public BitField(final int mask) {
         _mask = mask;
-        int count = 0;
-        int bit_pattern = mask;
-
-        if (bit_pattern != 0) {
-            while ((bit_pattern & 1) == 0) {
-                count++;
-                bit_pattern >>= 1;
-            }
-        }
-        _shift_count = count;
+        _shift_count = mask != 0 ? Integer.numberOfTrailingZeros(mask) : 0;
     }
 
     /**