diff --git a/src/imageformats/pcx.cpp b/src/imageformats/pcx.cpp
index be12c8f..6d47cf9 100644
--- a/src/imageformats/pcx.cpp
+++ b/src/imageformats/pcx.cpp
@@ -308,7 +308,7 @@ static bool readImage4(QImage &img, QDataStream &s, const PCXHEADER &header)
         return false;
     }
 
-    if (header.BytesPerLine < (header.width() / 8)) {
+    if (header.BytesPerLine < (header.width() + 7) / 8) {
         qWarning() << "PCX image has invalid BytesPerLine value";
         return false;
     }