diff --git a/meson.build b/meson.build
index 69464bd98..f0278ec29 100644
--- a/meson.build
+++ b/meson.build
@@ -165,6 +165,8 @@ int main(int argc, char **argv)
     libjpeg_dep = disabler()
   else
     add_project_arguments('-DHAVE_LIBJPEG=1', language: 'c')
+
+    add_project_arguments('-DJPEG_SIZE="unsigned long"', language: 'c')
   endif
 endif