diff --git a/package/dhrystone/Makefile b/package/dhrystone/Makefile
index d628ddb507..f7a212b2fe 100644
--- a/package/dhrystone/Makefile
+++ b/package/dhrystone/Makefile
@@ -1,4 +1,4 @@
-CPPFLAGS += -DNO_PROTOTYPES=1
+CPPFLAGS += -DNO_PROTOTYPES=1 -DHZ=100
 LDLIBS += -lm
 
 all: dhrystone