diff --git a/apps/shared/avifjpeg.c b/apps/shared/avifjpeg.c
index 024c911a32..262d297e41 100644
--- a/apps/shared/avifjpeg.c
+++ b/apps/shared/avifjpeg.c
@@ -948,6 +948,7 @@ static avifBool avifJPEGReadInternal(FILE * f,
 
         int row_stride = cinfo.output_width * cinfo.output_components;
         JSAMPARRAY buffer = (*cinfo.mem->alloc_sarray)((j_common_ptr)&cinfo, JPOOL_IMAGE, row_stride, 1);
+        AVIF_ANNOTATE_MEMORY_IS_INITIALIZED(buffer, row_stride);
 
         avif->width = cinfo.output_width;
         avif->height = cinfo.output_height;
@@ -994,6 +995,7 @@ static avifBool avifJPEGReadInternal(FILE * f,
                 goto cleanup;
             }
             uint8_t * pixelRow = &rgb.pixels[row * rgb.rowBytes];
+            AVIF_ANNOTATE_MEMORY_IS_INITIALIZED(buffer, sizeof(buffer[0]));
             AVIF_ANNOTATE_MEMORY_IS_INITIALIZED(buffer[0], rgb.rowBytes);
             memcpy(pixelRow, buffer[0], rgb.rowBytes);
             ++row;