diff --git a/src/init.cpp b/src/init.cpp
index d6c224a1013..75d6cf44a88 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -468,7 +468,7 @@ std::string HelpMessage(HelpMessageMode mode)
     {
         strUsage += HelpMessageOpt("-printpriority", strprintf("Log transaction priority and fee per kB when mining blocks (default: %u)", DEFAULT_PRINTPRIORITY));
     }
-    strUsage += HelpMessageOpt("-shrinkdebugfile", _("Shrink debug.log file on client startup (default: 1 when no -debug)"));
+    strUsage += HelpMessageOpt("-shrinkdebugfile", _("Shrink debug.log file on startup/SIGHUP (default: 1 when no -debug)"));
 
     AppendParamsHelpMessages(strUsage, showDebug);
 
diff --git a/src/util.cpp b/src/util.cpp
index 0f7a4db7a46..c189b32f394 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -324,6 +324,10 @@ int LogPrintStr(const std::string &str)
             // reopen the log file, if requested
             if (fReopenDebugLog) {
                 fReopenDebugLog = false;
+
+                if (GetBoolArg("-shrinkdebugfile", !fDebug)) {
+                    ShrinkDebugFile();
+                }
                 fs::path pathDebug = GetDataDir() / "debug.log";
                 if (fsbridge::freopen(pathDebug,"a",fileout) != NULL)
                     setbuf(fileout, NULL); // unbuffered