diff --git a/client/TracySysTrace.cpp b/client/TracySysTrace.cpp
index 4a4e70fe..75bc76fa 100644
--- a/client/TracySysTrace.cpp
+++ b/client/TracySysTrace.cpp
@@ -154,13 +154,15 @@ void SysTraceWorker( void* ptr )
 
 #  elif defined __linux__
 
-#  include <sys/types.h>
-#  include <sys/stat.h>
-#  include <fcntl.h>
-#  include <stdint.h>
-#  include <stdio.h>
-#  include <string.h>
-#  include <unistd.h>
+#    include <sys/types.h>
+#    include <sys/stat.h>
+#    include <fcntl.h>
+#    include <stdint.h>
+#    include <stdio.h>
+#    include <string.h>
+#    include <unistd.h>
+
+#    include "TracyProfiler.hpp"
 
 namespace tracy
 {
@@ -270,6 +272,10 @@ void SysTraceWorker( void* ptr )
         auto rd = getline( &line, &lsz, f );
         if( rd < 0 ) break;
 
+#ifdef TRACY_ON_DEMAND
+        if( !GetProfiler().IsConnected() ) continue;
+#endif
+
         const char* ptr = line + 24;
         const auto cpu = (uint8_t)ReadNumber( ptr );