diff --git a/services/ja4ebpf/cmd/ja4ebpf/main.go b/services/ja4ebpf/cmd/ja4ebpf/main.go
index 3551e6f..3233221 100644
--- a/services/ja4ebpf/cmd/ja4ebpf/main.go
+++ b/services/ja4ebpf/cmd/ja4ebpf/main.go
@@ -733,6 +733,7 @@ func consumeSSLEvents(ctx context.Context, rd *perf.Reader, mgr *correlation.Man
 			if parser.IsHTTP1Response(sslData) {
 				resp := parser.ParseHTTP1Response(sslData)
 				if resp == nil {
+					log.Printf("[warn] HTTP/1.x response parsing failed for src=%v", key)
 					continue
 				}
 				mgr.Update(key, func(s *correlation.SessionState) {
@@ -868,6 +869,7 @@ func consumeSSLEvents(ctx context.Context, rd *perf.Reader, mgr *correlation.Man
 			// HTTP/1.x : parser la requête
 			req := parser.ParseHTTP1Request(sslData)
 			if req == nil {
+				log.Printf("[warn] HTTP/1.x request parsing failed, src=%v, data_len=%d", key, len(sslData))
 				continue
 			}
 			mgr.Update(key, func(s *correlation.SessionState) {
@@ -1028,6 +1030,7 @@ func consumeHTTPPlainEvents(ctx context.Context, rd *perf.Reader, mgr *correlati
 		if parser.IsHTTP1Request(httpData) {
 			req := parser.ParseHTTP1Request(httpData)
 			if req == nil {
+				log.Printf("[warn] HTTP plain request parsing failed, src=%v, data_len=%d", key, len(httpData))
 				continue
 			}
 			mgr.Update(key, func(s *correlation.SessionState) {