1 files changed, 5 insertions, 5 deletions
diff --git a/src/math/numbertheory/powm_fw.cpp b/src/math/numbertheory/powm_fw.cpp
index 68dabc332..afc53f233 100644
--- a/src/math/numbertheory/powm_fw.cpp
+++ b/src/math/numbertheory/powm_fw.cpp
@@ -28,7 +28,7 @@ void Fixed_Window_Exponentiator::set_base(const BigInt& base)
 
    g.resize((1 << window_bits) - 1);
    g[0] = base;
-   for(u32bit j = 1; j != g.size(); ++j)
+   for(size_t j = 1; j != g.size(); ++j)
       g[j] = reducer.multiply(g[j-1], g[0]);
    }
 
@@ -37,15 +37,15 @@ void Fixed_Window_Exponentiator::set_base(const BigInt& base)
 */
 BigInt Fixed_Window_Exponentiator::execute() const
    {
-   const u32bit exp_nibbles = (exp.bits() + window_bits - 1) / window_bits;
+   const size_t exp_nibbles = (exp.bits() + window_bits - 1) / window_bits;
 
    BigInt x = 1;
-   for(u32bit j = exp_nibbles; j > 0; --j)
+   for(size_t j = exp_nibbles; j > 0; --j)
       {
-      for(u32bit k = 0; k != window_bits; ++k)
+      for(size_t k = 0; k != window_bits; ++k)
          x = reducer.square(x);
 
-      u32bit nibble = exp.get_substring(window_bits*(j-1), window_bits);
+      size_t nibble = exp.get_substring(window_bits*(j-1), window_bits);
       if(nibble)
          x = reducer.multiply(x, g[nibble-1]);
       }