diff -aur src.orig/k2pdfopt_v2.51/CMakeLists.txt src/k2pdfopt_v2.51/CMakeLists.txt
--- src.orig/k2pdfopt_v2.51/CMakeLists.txt	2019-03-24 21:45:17.683484849 +0100
+++ src/k2pdfopt_v2.51/CMakeLists.txt	2019-03-24 21:46:17.443514984 +0100
@@ -5,7 +5,7 @@
 
 include(FindPkgConfig)
 
-set(K2PDFOPT_LIB "-lm")
+set(K2PDFOPT_LIB "-lm -ljasper")
 
 # cmake -DCMAKE_BUILD_TYPE=Debug <path>
 
diff -aur src.orig/k2pdfopt_v2.51/willuslib/bmp.c src/k2pdfopt_v2.51/willuslib/bmp.c
--- src.orig/k2pdfopt_v2.51/willuslib/bmp.c	2019-01-01 00:21:16.000000000 +0100
+++ src/k2pdfopt_v2.51/willuslib/bmp.c	2019-03-24 21:45:48.713500408 +0100
@@ -37,7 +37,7 @@
 #include <jpeglib.h>
 #endif
 #ifdef HAVE_JASPER_LIB
-#include <jasper.h>
+#include <jasper/jasper.h>
 #endif
 
 #define BOUND(x,xmin,xmax)  if ((x)<(xmin)) (x)=(xmin); else { if ((x)>(xmax)) (x)=(xmax); }