diff --git a/internal/loki/backend_serve_expert.go b/internal/loki/backend_serve_expert.go
index c6350be..833bc78 100644
--- a/internal/loki/backend_serve_expert.go
+++ b/internal/loki/backend_serve_expert.go
@@ -162,7 +162,9 @@ func fitBlocker(cfg map[string]string, extra []string, si serveSysInfo) string {
 			ngl = si.ArgEnv["LLAMA_ARG_N_GPU_LAYERS"]
 		}
 	}
-	if ngl = strings.TrimSpace(ngl); ngl != "" && !strings.EqualFold(ngl, "auto") {
+	// -1 est la valeur par défaut du moteur, celle qu'« auto » écrit : fit ne
+	// la prend pas pour un choix de l'utilisateur.
+	if ngl = strings.TrimSpace(ngl); ngl != "" && ngl != "-1" && !strings.EqualFold(ngl, "auto") {
 		return "couches GPU fixées à " + ngl
 	}
 	if hasAnyFlag(extra, "-ts", "--tensor-split") || si.ArgEnv["LLAMA_ARG_TENSOR_SPLIT"] != "" {
@@ -175,8 +177,10 @@ func fitBlocker(cfg map[string]string, extra []string, si serveSysInfo) string {
 	if sm == "" {
 		sm = si.ArgEnv["LLAMA_ARG_SPLIT_MODE"]
 	}
-	if strings.EqualFold(strings.TrimSpace(sm), "row") {
-		return "-sm row"
+	// row ET tensor : fit abandonne sur l'une comme sur l'autre (« not
+	// implemented », common/fit.cpp).
+	if sm = strings.ToLower(strings.TrimSpace(sm)); sm == "row" || sm == "tensor" {
+		return "-sm " + sm
 	}
 	return ""
 }
diff --git a/internal/loki/backend_serve_expert_test.go b/internal/loki/backend_serve_expert_test.go
index 5a1c213..ed99d40 100644
--- a/internal/loki/backend_serve_expert_test.go
+++ b/internal/loki/backend_serve_expert_test.go
@@ -84,6 +84,17 @@ func TestFitTargetArgs(t *testing.T) {
 			si:  serveSysInfo{Help: helpFit, ArgEnv: map[string]string{"LLAMA_ARG_FIT": "off"}}, wantNotes: 1},
 		{name: "-sm row : rien",
 			cfg: map[string]string{"FIT_TARGET": "1024", "EXTRA_ARGS": "-sm row"}, si: fit, wantNotes: 1},
+		{name: "-sm tensor : fit abandonne aussi, rien",
+			cfg: map[string]string{"FIT_TARGET": "1024", "EXTRA_ARGS": "--split-mode tensor"}, si: fit, wantNotes: 1},
+		{name: "LLAMA_ARG_SPLIT_MODE=tensor : rien",
+			cfg: map[string]string{"FIT_TARGET": "1024"},
+			si:  serveSysInfo{Help: helpFit, ArgEnv: map[string]string{"LLAMA_ARG_SPLIT_MODE": "tensor"}}, wantNotes: 1},
+		{name: "-sm layer : fit tourne",
+			cfg: map[string]string{"FIT_TARGET": "1024", "EXTRA_ARGS": "-sm layer"}, si: fit,
+			want: []string{"--fit-target", "1024"}, wantNotes: 1},
+		{name: "-ngl -1 (le défaut du moteur) : fit tourne",
+			cfg: map[string]string{"FIT_TARGET": "1024", "EXTRA_ARGS": "-ngl -1"}, si: fit,
+			want: []string{"--fit-target", "1024"}, wantNotes: 1},
 		{name: "--device choisi : le placement reste à fit, accepté",
 			cfg: map[string]string{"FIT_TARGET": "1024,3072", "EXTRA_ARGS": "--device CUDA1,CUDA0"}, si: fit,
 			want: []string{"--fit-target", "1024,3072"}, wantNotes: 1},