diff --git a/src/plugins/imageformats/jpeg/qjpeghandler.cpp b/src/plugins/imageformats/jpeg/qjpeghandler.cpp
index beef18f260..a17afc0f69 100644
--- a/src/plugins/imageformats/jpeg/qjpeghandler.cpp
+++ b/src/plugins/imageformats/jpeg/qjpeghandler.cpp
@@ -61,13 +61,6 @@
 
 // including jpeglib.h seems to be a little messy
 extern "C" {
-// jpeglib.h->jmorecfg.h tries to typedef int boolean; but this conflicts with
-// some Windows headers that may or may not have been included
-#ifdef HAVE_BOOLEAN
-#  undef HAVE_BOOLEAN
-#endif
-#define boolean jboolean
-
 #define XMD_H           // shut JPEGlib up
 #include <jpeglib.h>
 #ifdef const