diff --git a/src/libImaging/TiffDecode.c b/src/libImaging/TiffDecode.c
index a68f73993..871b0bcdb 100644
--- a/src/libImaging/TiffDecode.c
+++ b/src/libImaging/TiffDecode.c
@@ -194,6 +194,9 @@ int ReadTile(TIFF* tiff, UINT32 col, UINT32 row, UINT32* buffer) {
         }
 
         swap_line = (UINT32*)malloc(swap_line_size);
+        if (swap_line == NULL) {
+            return -1;
+        }
         /*
          * For some reason the TIFFReadRGBATile() function chooses the
          * lower left corner as the origin.  Vertically mirror scanlines.