diff --git a/ddtrace/tracer/sqlcomment.go b/ddtrace/tracer/sqlcomment.go
index f66e6ee5f9..e9c2007b8b 100644
--- a/ddtrace/tracer/sqlcomment.go
+++ b/ddtrace/tracer/sqlcomment.go
@@ -12,6 +12,7 @@ import (
 	"gopkg.in/DataDog/dd-trace-go.v1/ddtrace"
 	"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext"
 	"gopkg.in/DataDog/dd-trace-go.v1/internal/globalconfig"
+	"gopkg.in/DataDog/dd-trace-go.v1/internal/log"
 )
 
 // SQLCommentInjectionMode represents the mode of SQL comment injection.
@@ -147,6 +148,9 @@ func commentQuery(query string, tags map[string]string) string {
 	if query == "" {
 		return b.String()
 	}
+	if log.DebugEnabled() {
+		log.Debug("Injected sql comment %s", b.String())
+	}
 	b.WriteRune(' ')
 	b.WriteString(query)
 	return b.String()