diff --git a/Makefile.osx b/Makefile.osx
index 586d449..f2469bc 100644
--- a/Makefile.osx
+++ b/Makefile.osx
@@ -116,6 +116,11 @@
 .c.o:
 	$(CC) $(CFLAGS) -c -o $@ $<
 
+src/haproxy.o: src/haproxy.c
+	$(CC) $(CFLAGS) -DBUILD_TARGET='"$(TARGET)"' -DBUILD_CC='"$(CC)"' \
+	                -DBUILD_CPU='"$(CPU)"' -DBUILD_REGEX='"$(REGEX)"' \
+	                -DBUILD_OPTS='"$(COPTS)"' -c -o $@ $<
+
 src/dlmalloc.o: $(DLMALLOC_SRC)
 	$(CC) $(CFLAGS) -DDEFAULT_MMAP_THRESHOLD=$(DLMALLOC_THRES) -c -o $@ $<