1 files changed, 1 insertions, 1 deletions
diff --git a/src/common/bits.c b/src/common/bits.c
index cdcef85..32041b9 100644
--- a/src/common/bits.c
+++ b/src/common/bits.c
@@ -582,7 +582,7 @@ size_t popcount_for_bit_field(const bitfield_t *field)
         value = field->bits[i];
 
         if (remaining < (8 * sizeof(unsigned long)))
-            value &= 1 << (remaining - 1);
+            value &= (1lu << (remaining + 1)) - 1;
 
 #if __WORDSIZE == 64
         result += popcount_64(value);