diff --git a/src/main.cpp b/src/main.cpp
index 20ea1112f..6ac591353 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5114,7 +5114,9 @@ bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& sta
         // changing at run-time, from Consensus::Params being a const struct
         unsigned int nNextWork = GetNextWorkRequired(pindexPrev, &block, consensusParams);
 
-        LogPrintf("%s: nbits ,%d,%lu,%lu,%d\n",__func__, nHeight, nNextWork, block.nBits, nNextWork - block.nBits );
+        if (fDebug) {
+            LogPrintf("%s: nbits ,%d,%lu,%lu,%d\n",__func__, nHeight, nNextWork, block.nBits, nNextWork - block.nBits );
+        }
         if (block.nBits != nNextWork) {
                 // Enforce correct nbits at DAA fork height, before that, ignore
                 if (nHeight > daaForkHeight) {