diff --git a/src/Makefile b/src/Makefile

index f04b4c4..b8d4b19 100644

--- a/src/Makefile

+++ b/src/Makefile

@@ -83,15 +83,15 @@ libespeak_SOURCES = speak_lib.cpp compiledict.cpp dictionary.cpp intonation.cpp

 SRCS1=$(speak_SOURCES)

 OBJS1=$(patsubst %.cpp,%.o,$(SRCS1))

-LIBS1=-lstdc++ $(LIB_AUDIO) -lpthread $(EXTRA_LIBS)

+LIBS1=-lstdc++ -lm $(LIB_AUDIO) -lpthread $(EXTRA_LIBS)

 SRCS2=$(libespeak_SOURCES)

 OBJS2=$(patsubst %.cpp,x_%.o,$(SRCS2))

-LIBS2=-lstdc++ $(LIB_AUDIO) -lpthread

+LIBS2=-lstdc++ -lm $(LIB_AUDIO) -lpthread

 SRCS3 = espeak.cpp

 OBJS3=$(patsubst %.cpp,%.o,$(SRCS3))

-LIBS3=-lstdc++ -L . -lespeak

+LIBS3=-lstdc++ -lm -L . -lespeak

 CXXFLAGS=-O2