diff --git a/shake.h b/shake.h
index 8d097097..18a1c897 100644
--- a/shake.h
+++ b/shake.h
@@ -41,7 +41,7 @@ public:
     void TruncatedFinal(byte *hash, size_t size);
 
 protected:
-	inline unsigned int r() const {return BlockSize();}
+    inline unsigned int r() const {return BlockSize();}
 
     FixedSizeSecBlock<word64, 25> m_state;
     unsigned int m_digestSize, m_counter;
@@ -56,7 +56,7 @@ class SHAKE_Final : public SHAKE
 public:
     CRYPTOPP_CONSTANT(DIGESTSIZE = (T_Strength == 128 ? 32 : 64))
     CRYPTOPP_CONSTANT(BLOCKSIZE = (T_Strength == 128 ? 1344/8 : 1088/8))
-	static std::string StaticAlgorithmName() { return "SHAKE" + IntToString(T_Strength); }
+    static std::string StaticAlgorithmName() { return "SHAKE" + IntToString(T_Strength); }
 
     /// \brief Construct a SHAKE-X message digest
     SHAKE_Final() : SHAKE(DIGESTSIZE) {}