1 files changed, 10 insertions, 0 deletions
diff --git a/src/mongo/platform/random.cpp b/src/mongo/platform/random.cpp
index b7fd984c411..ea641460037 100644
--- a/src/mongo/platform/random.cpp
+++ b/src/mongo/platform/random.cpp
@@ -40,6 +40,7 @@
 #include <cstdlib>
 #include <iostream>
 #include <fstream>
+#include <limits>
 
 #include "mongo/platform/basic.h"
 
@@ -93,6 +94,15 @@ int64_t PseudoRandom::nextInt64() {
     return (a << 32) | b;
 }
 
+double PseudoRandom::nextCanonicalDouble() {
+    double result;
+    do {
+        auto generated = static_cast<uint64_t>(nextInt64());
+        result = static_cast<double>(generated) / std::numeric_limits<uint64_t>::max();
+    } while (result == 1.0);
+    return result;
+}
+
 // --- SecureRandom ----
 
 SecureRandom::~SecureRandom() {}