diff --git a/benchmarks/Makefile b/benchmarks/Makefile
index 9882082f6..c46ea17cc 100644
--- a/benchmarks/Makefile
+++ b/benchmarks/Makefile
@@ -6,10 +6,10 @@ binaries := AesonParse AesonEncode JsonParse
 all: $(binaries) $(binaries:%=%_p)
 
 %_p: %.hs
-	$(ghc) $(ghcflags) -prof -auto-all --make -o $@ $^
+	$(ghc) $(ghcflags) -prof -auto-all -rtsopts --make -o $@ $^
 
 %: %.hs
-	$(ghc) $(ghcflags) --make -o $@ $^
+	$(ghc) $(ghcflags) --make -rtsopts -o $@ $^
 
 clean:
 	-rm -f *.o *.hi $(binaries) $(binaries:%=%_p)