diff --git a/Makefile b/Makefile
index f632e6ed188e180fe79f0ccdb42d037fe29fb751..50753774f001cf01d3bd5d2db3102d5decdd7af1 100644
--- a/Makefile
+++ b/Makefile
@@ -34,7 +34,7 @@ endif
 OPT += -DWRITE_IMAGE
 # perform w-stacking phase correction
 OPT += -DPHASE_ON
-# Support CFITSIO
+# Support CFITSIO !!! Remember to add the path to the CFITSIO library to LD_LIBRARY_PATH
 OPT += -DFITSIO
 # Perform true parallel images writing
 #OPT += -DPARALLELIO