diff --git a/mk/board_native.mk b/mk/board_native.mk
index fd94c0884c..a77511a26b 100644
--- a/mk/board_native.mk
+++ b/mk/board_native.mk
@@ -57,12 +57,17 @@ CFLAGS         +=   $(WARNFLAGS) $(DEPFLAGS) $(COPTS)
 ASFLAGS         =   -g $(CPUFLAGS) $(DEFINES) -Wa,$(LISTOPTS) $(DEPFLAGS)
 ASFLAGS        +=   $(ASOPTS)
 LDFLAGS         =   -g $(CPUFLAGS) $(OPTFLAGS) $(WARNFLAGS)
+UNAME_S        :=   $(shell uname -s)
 
 ifneq ($(SYSTYPE),Darwin)
 LDFLAGS        +=   -Wl,--gc-sections -Wl,-Map -Wl,$(SKETCHMAP)
 endif
 
-LIBS ?= -lm -lrt -pthread
+LIBS ?= -lm -pthread
+ifneq ($(UNAME_S),Darwin)
+CXXFLAGS += -lrt
+endif
+
 ifneq ($(findstring CYGWIN, $(SYSTYPE)),)
 LIBS += -lwinmm
 endif