diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb565b34d..6e99d0f9b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -110,7 +110,9 @@
 - Archive:
   - Fix favorite's parent folders thinking they are favorited too (by @Willy-JL)
   - Fix rename extension show/hide behavior (by @Willy-JL)
-- Infrared: Correct Samsung.ir CH+ command (by @skyhawkillusions)
+- Infrared:
+  - Correct Samsung.ir CH+ command (by @skyhawkillusions)
+  - OFW: Check for negative timings (by @gsurkov)
 - FBT:
   - Consistent version/branch info, fix gitorigin (by @Willy-JL)
   - OFW: Fixed starting apps with spaces in path (by @hedger)
diff --git a/lib/flipper_format/flipper_format_stream.c b/lib/flipper_format/flipper_format_stream.c
index 83e77a4e2..b9d33169c 100644
--- a/lib/flipper_format/flipper_format_stream.c
+++ b/lib/flipper_format/flipper_format_stream.c
@@ -400,7 +400,11 @@ bool flipper_format_stream_read_value_line(
                     }; break;
                     case FlipperStreamValueUint32: {
                         uint32_t* data = _data;
-                        scan_values = sscanf(furi_string_get_cstr(value), "%" PRIu32, &data[i]);
+                        // Minus sign is allowed in scanf() for unsigned numbers, resulting in unintentionally huge values with no error reported
+                        if(!furi_string_start_with(value, "-")) {
+                            scan_values =
+                                sscanf(furi_string_get_cstr(value), "%" PRIu32, &data[i]);
+                        }
                     }; break;
                     case FlipperStreamValueHexUint64: {
                         uint64_t* data = _data;