diff --git a/src/pixie/fileformats/jpeg.nim b/src/pixie/fileformats/jpeg.nim
index fb782e48..0d5cbd01 100644
--- a/src/pixie/fileformats/jpeg.nim
+++ b/src/pixie/fileformats/jpeg.nim
@@ -508,7 +508,7 @@ proc decodeSOS(state: var DecoderState) =
   if state.progressive:
     if state.spectralStart > 63 or state.spectralEnd > 63:
       failInvalid()
-    if state.spectralEnd > state.spectralEnd:
+    if state.spectralStart > state.spectralEnd:
       failInvalid()
     if state.successiveApproxHigh > 13 or state.successiveApproxLow > 13:
       failInvalid()
@@ -715,7 +715,7 @@ proc decodeProgressiveContinuationBlock(
 
     if state.eobRun != 0:
       dec state.eobRun
-      for k in state.spectralStart ..< state.spectralEnd:
+      for k in state.spectralStart .. state.spectralEnd:
         let zig = deZigZag[k]
         if data[zig] != 0:
           if state.readBit() != 0:
diff --git a/tests/fileformats/jpeg/masters/chair_normal.jpg b/tests/fileformats/jpeg/masters/chair_normal.jpg
new file mode 100644
index 00000000..a2d96be3
Binary files /dev/null and b/tests/fileformats/jpeg/masters/chair_normal.jpg differ
diff --git a/tests/jpegsuite.nim b/tests/jpegsuite.nim
index 51d04e91..ead7a906 100644
--- a/tests/jpegsuite.nim
+++ b/tests/jpegsuite.nim
@@ -31,6 +31,7 @@ const jpegSuiteFiles* = [
   "tests/fileformats/jpeg/masters/exif_overrun.jpg",
   "tests/fileformats/jpeg/masters/grayscale_test.jpg",
   "tests/fileformats/jpeg/masters/progressive.jpg",
+  "tests/fileformats/jpeg/masters/chair_normal.jpg",
 
   "tests/fileformats/jpeg/masters/testimg.jpg",
   "tests/fileformats/jpeg/masters/testimgp.jpg",