diff --git a/sample/gio/Makefile.am b/sample/gio/Makefile.am
index 243ca9b47..3e7db53b4 100755
--- a/sample/gio/Makefile.am
+++ b/sample/gio/Makefile.am
@@ -6,13 +6,13 @@ assemblies = 					\
 	$(top_builddir)/glib/glib-sharp.dll 	\
 	$(top_builddir)/gio/gio-sharp.dll 
 
-references=$(addprefix /r:, $(assemblies))
+references=$(addprefix -r:, $(assemblies))
 
 noinst_SCRIPTS = $(TARGETS)
 CLEANFILES = $(TARGETS) $(DEBUGS)
 
 .cs.exe: $(assemblies)
-	$(CSC) /debug /out:$@ $(references) $<
+	$(CSC) $(CSFLAGS) /out:$@ $(references) $<
 
 EXTRA_DIST = 				\
 	AppInfo.cs			\
diff --git a/sample/gtk-gio/Makefile.am b/sample/gtk-gio/Makefile.am
index b273709cd..b965ce364 100755
--- a/sample/gtk-gio/Makefile.am
+++ b/sample/gtk-gio/Makefile.am
@@ -11,13 +11,13 @@ assemblies = 					\
 	$(top_builddir)/pango/pango-sharp.dll	\
 	$(top_builddir)/atk/atk-sharp.dll
 
-references=$(addprefix /r:, $(assemblies))
+references=$(addprefix -r:, $(assemblies))
 
 noinst_SCRIPTS = $(TARGETS)
 CLEANFILES = $(TARGETS) $(DEBUGS)
 
 .cs.exe: $(assemblies)
-	$(CSC) /out:$@ $(references) $<
+	$(CSC) $(CSFLAGS) /out:$@ $(references) $<
 
 EXTRA_DIST = 				\
 	MountOperation.cs