diff --git a/src/validation.cpp b/src/validation.cpp
index 4fcb2cca1656e5..19c3285bbb57ce 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -2638,7 +2638,7 @@ bool FindBlockPos(CValidationState& state, CDiskBlockPos& pos, unsigned int nAdd
         pos.nPos = vinfoBlockFile[nFile].nSize;
     }
 
-    if (nFile != nLastBlockFile) {
+    if ((int)nFile != nLastBlockFile) {
         if (!fKnown) {
             LogPrintf("Leaving block file %i: %s\n", nFile, vinfoBlockFile[nFile].ToString());
         }