diff --git a/core/src-c/bitfield.c b/core/src-c/bitfield.c
index 623f601..c035353 100644
--- a/core/src-c/bitfield.c
+++ b/core/src-c/bitfield.c
@@ -17,6 +17,7 @@ u64_t rr_bitpad_lsb(usz_t count)
     {
         result |= 1 << index;
     }
+    return result;
 }
 
 u64_t rr_bitpad_msb(usz_t count)
@@ -26,4 +27,5 @@ u64_t rr_bitpad_msb(usz_t count)
     {
         result |= (1 << 63) >> index;
     }
+    return result;
 }