diff --git a/src/bloom.cpp b/src/bloom.cpp
--- a/src/bloom.cpp
+++ b/src/bloom.cpp
@@ -260,10 +260,10 @@
         uint32_t pos = FastMod(h, data.size());
         /* The lowest bit of pos is ignored, and set to zero for the first bit,
          * and to one for the second. */
-        data[pos & ~1] = (data[pos & ~1] & ~(uint64_t(1) << bit)) |
-                         uint64_t(nGeneration & 1) << bit;
-        data[pos | 1] = (data[pos | 1] & ~(uint64_t(1) << bit)) |
-                        uint64_t(nGeneration >> 1) << bit;
+        data[pos & ~1U] = (data[pos & ~1U] & ~(uint64_t(1) << bit)) |
+                          uint64_t(nGeneration & 1) << bit;
+        data[pos | 1U] = (data[pos | 1] & ~(uint64_t(1) << bit)) |
+                         uint64_t(nGeneration >> 1) << bit;
     }
 }
 
diff --git a/test/sanitizer_suppressions/ubsan b/test/sanitizer_suppressions/ubsan
--- a/test/sanitizer_suppressions/ubsan
+++ b/test/sanitizer_suppressions/ubsan
@@ -37,7 +37,6 @@
 implicit-integer-sign-change:*/new_allocator.h
 implicit-integer-sign-change:/usr/include/boost/date_time/format_date_parser.hpp
 implicit-integer-sign-change:bech32.cpp
-implicit-integer-sign-change:bloom.cpp
 implicit-integer-sign-change:coins.h
 implicit-integer-sign-change:compat/stdin.cpp
 implicit-integer-sign-change:compressor.h