diff --git a/daemon/logging/trace/trace_debug.go b/daemon/logging/trace/trace_debug.go
index 773e3e9..93ca6e7 100644
--- a/daemon/logging/trace/trace_debug.go
+++ b/daemon/logging/trace/trace_debug.go
@@ -3,9 +3,11 @@ package trace
 import (
 	"fmt"
 	"os"
+
+	"github.com/zrepl/zrepl/util/envconst"
 )
 
-const debugEnabled = false
+var debugEnabled = envconst.Bool("ZREPL_TRACE_DEBUG_ENABLED", false)
 
 func debug(format string, args ...interface{}) {
 	if !debugEnabled {