diff --git a/src/PIL/TiffImagePlugin.py b/src/PIL/TiffImagePlugin.py
index 43a2f7c40..fe9cc5a18 100644
--- a/src/PIL/TiffImagePlugin.py
+++ b/src/PIL/TiffImagePlugin.py
@@ -1508,10 +1508,10 @@ def _save(im, fp, filename):
     # data orientation
     stride = len(bits) * ((im.size[0] * bits[0] + 7) // 8)
     ifd[ROWSPERSTRIP] = im.size[1]
-    stripByteCounts = stride * im.size[1]
-    if stripByteCounts >= 2 ** 16:
+    strip_byte_counts = stride * im.size[1]
+    if strip_byte_counts >= 2 ** 16:
         ifd.tagtype[STRIPBYTECOUNTS] = TiffTags.LONG
-    ifd[STRIPBYTECOUNTS] = stripByteCounts
+    ifd[STRIPBYTECOUNTS] = strip_byte_counts
     ifd[STRIPOFFSETS] = 0  # this is adjusted by IFD writer
     # no compression by default:
     ifd[COMPRESSION] = COMPRESSION_INFO_REV.get(compression, 1)