diff --git a/src/bloom.cpp b/src/bloom.cpp
index 8d47cb76e..860bc0211 100644
--- a/src/bloom.cpp
+++ b/src/bloom.cpp
@@ -19,7 +19,7 @@
 #define LN2SQUARED 0.4804530139182014246671025263266649717305529515945455
 #define LN2 0.6931471805599453094172321214581765680755001343602552
 
-CBloomFilter::CBloomFilter(unsigned int nElements, double nFPRate, unsigned int nTweakIn, unsigned char nFlagsIn) :
+CBloomFilter::CBloomFilter(const unsigned int nElements, const double nFPRate, const unsigned int nTweakIn, unsigned char nFlagsIn) :
     /**
      * The ideal size for a bloom filter with a given number of elements and false positive rate is:
      * - nElements * log(fp rate) / ln(2)^2
@@ -40,7 +40,7 @@ CBloomFilter::CBloomFilter(unsigned int nElements, double nFPRate, unsigned int
 }
 
 // Private constructor used by CRollingBloomFilter
-CBloomFilter::CBloomFilter(unsigned int nElements, double nFPRate, unsigned int nTweakIn) :
+CBloomFilter::CBloomFilter(const unsigned int nElements, const double nFPRate, const unsigned int nTweakIn) :
     vData((unsigned int)(-1  / LN2SQUARED * nElements * log(nFPRate)) / 8),
     isFull(false),
     isEmpty(true),
@@ -120,7 +120,7 @@ void CBloomFilter::clear()
     isEmpty = true;
 }
 
-void CBloomFilter::reset(unsigned int nNewTweak)
+void CBloomFilter::reset(const unsigned int nNewTweak)
 {
     clear();
     nTweak = nNewTweak;
@@ -214,7 +214,7 @@ void CBloomFilter::UpdateEmptyFull()
     isEmpty = empty;
 }
 
-CRollingBloomFilter::CRollingBloomFilter(unsigned int nElements, double fpRate)
+CRollingBloomFilter::CRollingBloomFilter(const unsigned int nElements, const double fpRate)
 {
     double logFpRate = log(fpRate);
     /* The optimal number of hash functions is log(fpRate) / log(0.5), but
diff --git a/src/bloom.h b/src/bloom.h
index 5ad727c33..7ca968223 100644
--- a/src/bloom.h
+++ b/src/bloom.h
@@ -54,7 +54,7 @@ private:
     unsigned int Hash(unsigned int nHashNum, const std::vector<unsigned char>& vDataToHash) const;
 
     // Private constructor for CRollingBloomFilter, no restrictions on size
-    CBloomFilter(unsigned int nElements, double nFPRate, unsigned int nTweak);
+    CBloomFilter(const unsigned int nElements, const double nFPRate, const unsigned int nTweak);
     friend class CRollingBloomFilter;
 
 public:
@@ -67,7 +67,7 @@ public:
      * It should generally always be a random value (and is largely only exposed for unit testing)
      * nFlags should be one of the BLOOM_UPDATE_* enums (not _MASK)
      */
-    CBloomFilter(unsigned int nElements, double nFPRate, unsigned int nTweak, unsigned char nFlagsIn);
+    CBloomFilter(const unsigned int nElements, const double nFPRate, const unsigned int nTweak, unsigned char nFlagsIn);
     CBloomFilter() : isFull(true), isEmpty(false), nHashFuncs(0), nTweak(0), nFlags(0) {}
 
     ADD_SERIALIZE_METHODS;
@@ -89,7 +89,7 @@ public:
     bool contains(const uint256& hash) const;
 
     void clear();
-    void reset(unsigned int nNewTweak);
+    void reset(const unsigned int nNewTweak);
 
     //! True if the size is <= MAX_BLOOM_FILTER_SIZE and the number of hash functions is <= MAX_HASH_FUNCS
     //! (catch a filter which was just deserialized which was too big)
@@ -122,7 +122,7 @@ public:
     // A random bloom filter calls GetRand() at creation time.
     // Don't create global CRollingBloomFilter objects, as they may be
     // constructed before the randomizer is properly initialized.
-    CRollingBloomFilter(unsigned int nElements, double nFPRate);
+    CRollingBloomFilter(const unsigned int nElements, const double nFPRate);
 
     void insert(const std::vector<unsigned char>& vKey);
     void insert(const uint256& hash);