diff --git a/hb/Makefile b/hb/Makefile
index aac993c..f78ce03 100644
--- a/hb/Makefile
+++ b/hb/Makefile
@@ -9,7 +9,7 @@ topdir=..
 INSTALL=/usr/bin/install
 RUNTIME=
 MCS=mcs
-MCSFLAGS= /debug+ /debug:full /nologo
+MCSFLAGS= -debug+ -debug:full -nologo
 
 ASSEMBLIES= Mono.GetOptions
 
@@ -18,12 +18,12 @@ SOURCES= hb.cs \
 
 # 
 
-REFS= $(addsuffix .dll, $(addprefix /r:, $(ASSEMBLIES)))
+REFS= $(addsuffix .dll, $(addprefix -r:, $(ASSEMBLIES)))
 
 all: hb.exe
 
 hb.exe: $(SOURCES) $(RESOURCES) $(STRINGFILES)
-	$(MCS) $(MCSFLAGS) $(REFS) $(RESS) /out:$@ $(SOURCES)
+	$(MCS) $(MCSFLAGS) $(REFS) $(RESS) -out:$@ $(SOURCES)
 
 clean:
 	rm -f *~ *.exe *.bak *.temp