diff --git a/src/ripple/core/impl/Config.cpp b/src/ripple/core/impl/Config.cpp
index 10063d8bf..5245a2168 100644
--- a/src/ripple/core/impl/Config.cpp
+++ b/src/ripple/core/impl/Config.cpp
@@ -482,7 +482,7 @@ Config::loadFromString(std::string const& fileContents)
     std::string strTemp;
 
     if (getSingleSection(secConfig, SECTION_XPOP_HISTORY, strTemp, j_))
-        XPOP_HISTORY = beast::lexicalCastThrow<bool>(strTemp);
+        XPOP_HISTORY = beast::lexicalCastThrow<uint32_t>(strTemp);
     
     if (getSingleSection(secConfig, SECTION_NETWORK_ID, strTemp, j_))
     {