diff --git a/client/Makefile b/client/Makefile
index f79d76988..05793685f 100644
--- a/client/Makefile
+++ b/client/Makefile
@@ -41,6 +41,7 @@ ifneq (,$(findstring MINGW,$(platform)))
 	endif
 	
 else ifeq ($(platform),Darwin)
+	CFLAGS += -I/usr/include/malloc/
 	LDLIBS = -L/opt/local/lib -lreadline -lpthread -lm
     CXXFLAGS = $(shell pkg-config --cflags QtCore QtGui 2>/dev/null) -Wall -O3
     QTLDLIBS = $(shell pkg-config --libs QtCore QtGui 2>/dev/null)