--- lib/DtHelp/Imakefile.orig	2019-12-15 16:29:42.835693000 +0100
+++ lib/DtHelp/Imakefile	2019-12-15 16:29:57.238969000 +0100
@@ -42,6 +42,8 @@ DEFINES = -DDTLIB $(LOCAL_DEFINES) \
 REQUIREDLIBS = SharedDtHelpReqs
 #endif
 
+REQUIREDLIBS += -ljpeg
+
 HEADERS = \
         CanvasP.h       CanvasSegP.h    Help.h \
         HelpDialog.h    HelpDialogP.h   HelpP.h \