diff --git a/Makefile b/Makefile
index d0bbace42..4792c2a39 100644
--- a/Makefile
+++ b/Makefile
@@ -27,6 +27,7 @@ VIEWPDF=$(BROWSE)
 PRINT=lpr
 
 GHC=ghc
+GHCI=ghci
 HADDOCK=haddock
 # used for make auto, http://joyful.com/repos/searchpath
 SP=sp
@@ -514,10 +515,10 @@ viewcoverage:
 
 # get a debug prompt
 ghci:
-	ghci $(INCLUDEPATHS) $(MAIN)
+	$(GHCI) $(INCLUDEPATHS) $(MAIN)
 
 ghciweb:
-	ghci $(BUILDFLAGS) $(WEBLANGEXTS) hledger-web/app/main.hs
+	$(GHCI) $(BUILDFLAGS) $(WEBLANGEXTS) hledger-web/app/main.hs
 
 # generate standard sample journals
 samplejournals: data/sample.journal data/100x100x10.journal data/1000x1000x10.journal data/1000x10000x10.journal data/10000x1000x10.journal data/10000x10000x10.journal data/100000x1000x10.journal