diff --git a/tools/power/x86/intel-speed-select/isst-display.c b/tools/power/x86/intel-speed-select/isst-display.c
index f6e2ce181123..e105fece47b6 100644
--- a/tools/power/x86/intel-speed-select/isst-display.c
+++ b/tools/power/x86/intel-speed-select/isst-display.c
@@ -316,21 +316,31 @@ void isst_ctdp_display_core_info(int cpu, FILE *outf, char *prefix,
 {
 	char header[256];
 	char value[256];
+	int level = 1;
+
+	if (out_format_is_json()) {
+		snprintf(header, sizeof(header), "package-%d:die-%d:cpu-%d",
+			 get_physical_package_id(cpu), get_physical_die_id(cpu),
+			 cpu);
+		format_and_print(outf, level++, header, NULL);
+	} else {
+		snprintf(header, sizeof(header), "package-%d",
+			 get_physical_package_id(cpu));
+		format_and_print(outf, level++, header, NULL);
+		snprintf(header, sizeof(header), "die-%d",
+			 get_physical_die_id(cpu));
+		format_and_print(outf, level++, header, NULL);
+		snprintf(header, sizeof(header), "cpu-%d", cpu);
+		format_and_print(outf, level++, header, NULL);
+	}
 
-	snprintf(header, sizeof(header), "package-%d",
-		 get_physical_package_id(cpu));
-	format_and_print(outf, 1, header, NULL);
-	snprintf(header, sizeof(header), "die-%d", get_physical_die_id(cpu));
-	format_and_print(outf, 2, header, NULL);
-	snprintf(header, sizeof(header), "cpu-%d", cpu);
-	format_and_print(outf, 3, header, NULL);
 	if (str0 && !val)
 		snprintf(value, sizeof(value), "%s", str0);
 	else if (str1 && val)
 		snprintf(value, sizeof(value), "%s", str1);
 	else
 		snprintf(value, sizeof(value), "%u", val);
-	format_and_print(outf, 4, prefix, value);
+	format_and_print(outf, level, prefix, value);
 
 	format_and_print(outf, 1, NULL, NULL);
 }