diff --git a/Makefile b/Makefile
index ef642dc..bb3fc37 100644
--- a/Makefile
+++ b/Makefile
@@ -44,7 +44,8 @@ install-bin:
 	for binfile in bin/*.rb ; do \
 		BINFILE=`basename $$binfile |sed -e 's/.rb$$//'`; \
 		install -D -o root -g root -m 755 $$binfile $(BINDIR)/$$BINFILE; \
-		sed -i -e 's|^QASIM_INCLUDE_DIR.*|QASIM_INCLUDE_DIR = "/usr/share/$(NAME)"|' $(BINDIR)/$$BINFILE; \
+		sed -i -e 's|^QASIM_INCLUDE_DIR.*|QASIM_INCLUDE_DIR = "/usr/share/$(NAME)/lib"|' $(BINDIR)/$$BINFILE; \
+		sed -i -e 's|^QASIM_DATA_DIR.*|QASIM_DATA_DIR = "/usr/share/$(NAME)"|' $(BINDIR)/$$BINFILE; \
 	done
 	#install -D -o root -g root -m 755 $(CURDIR)/bin/$(NAME)-gui.rb $(BINDIR)/$(NAME)-gui
 
diff --git a/bin/qasim-gui.rb b/bin/qasim-gui.rb
index 8a7b2b8..ef4bd12 100755
--- a/bin/qasim-gui.rb
+++ b/bin/qasim-gui.rb
@@ -9,7 +9,9 @@ require 'pp'
 require 'set'
 require 'fcntl'
 
-QASIM_INCLUDE_DIR = "."
+QASIM_INCLUDE_DIR = "lib"
+QASIM_DATA_DIR = "."
+
 $:.push QASIM_INCLUDE_DIR
 
 require 'qasim/constants'