diff --git a/src/OpenMesh/Core/Utils/RandomNumberGenerator.cc b/src/OpenMesh/Core/Utils/RandomNumberGenerator.cc
index a327cb9c..20802e2f 100644
--- a/src/OpenMesh/Core/Utils/RandomNumberGenerator.cc
+++ b/src/OpenMesh/Core/Utils/RandomNumberGenerator.cc
@@ -75,7 +75,7 @@ RandomNumberGenerator::RandomNumberGenerator(const size_t _resolution) :
   }
 
   for ( unsigned int i = 0 ; i < iterations_ - 1; ++i ) {
-    maxNum_ *= (RAND_MAX + 1);
+    maxNum_ *= (RAND_MAX + 1.0);
   }
 }
 
@@ -91,7 +91,7 @@ double RandomNumberGenerator::getRand() const {
   return randNum / maxNum_;
 }
 
-size_t RandomNumberGenerator::resolution() const {
+double RandomNumberGenerator::resolution() const {
   return maxNum_;
 }
 
diff --git a/src/OpenMesh/Core/Utils/RandomNumberGenerator.hh b/src/OpenMesh/Core/Utils/RandomNumberGenerator.hh
index b74b52cb..333f0374 100644
--- a/src/OpenMesh/Core/Utils/RandomNumberGenerator.hh
+++ b/src/OpenMesh/Core/Utils/RandomNumberGenerator.hh
@@ -88,7 +88,7 @@ public:
   /// returns a random double between 0.0 and 1.0 with a guaranteed resolution
   double getRand() const;
 
-  size_t resolution() const;
+  double resolution() const;
 
 private:
 
@@ -99,7 +99,7 @@ private:
   size_t iterations_;
 
   /// maximum random number generated, which is used for normalization
-  size_t maxNum_;
+  double maxNum_;
 };
 
 //=============================================================================