diff --git a/tests/libfixmath_unittests/Makefile b/tests/libfixmath_unittests/Makefile
index d7c734a3ab..294cc2cc48 100644
--- a/tests/libfixmath_unittests/Makefile
+++ b/tests/libfixmath_unittests/Makefile
@@ -15,6 +15,8 @@ ifneq (,$(filter native,$(BOARD)))
   export LINKFLAGS += -lm
 endif
 
+USEMODULE += printf_float
+
 include $(RIOTBASE)/Makefile.include
 
 test: