1 files changed, 4 insertions, 1 deletions

diff --git a/apps/plugins/imageviewer/png/png_decoder.c b/apps/plugins/imageviewer/png/png_decoder.c
index a0ce0519de..1349d75db6 100644
--- a/apps/plugins/imageviewer/png/png_decoder.c
+++ b/apps/plugins/imageviewer/png/png_decoder.c
@@ -2189,5 +2189,8 @@ void LodePNG_Decoder_init(LodePNG_Decoder* decoder,
 
 const char* LodePNG_perror(LodePNG_Decoder *decoder)
 {
-    return png_error_messages[decoder->error-PNG_ERROR_MIN];
+    if (decoder->error >= PNG_ERROR_MIN && decoder->error <= PNG_ERROR_MAX)
+        return png_error_messages[decoder->error-PNG_ERROR_MIN];
+    else
+        return NULL;
 }