diff --git a/src/lisp/Config.x86_darwin b/src/lisp/Config.x86_darwin
index d260368845525320df2e52c202142ac675d12ca1..a76280d46dbecfb08f83d8bb672bb8747cbf2a5a 100644
--- a/src/lisp/Config.x86_darwin
+++ b/src/lisp/Config.x86_darwin
@@ -22,7 +22,8 @@ OS_SRC += k_sin.c k_cos.c k_tan.c s_sin.c s_cos.c s_tan.c sincos.c \
 	s_log1p.c s_expm1.c e_pow.c e_exp.c e_log.c \
 	e_acos.c e_asin.c s_atan.c \
 	e_cosh.c e_sinh.c s_tanh.c \
-	e_acosh.c s_asinh.c e_atanh.c
+	e_acosh.c s_asinh.c e_atanh.c \
+	e_atan2.c
 
 k_sin.o : k_sin.c
 	$(CC) -c $(CFLAGS) $(CPPFLAGS) $(CC_REM_PIO2) $<
@@ -72,3 +73,6 @@ e_asinh.o : s_asinh.c
 	$(CC) -c $(CFLAGS) $(CPPFLAGS) $(CC_REM_PIO2) $<
 e_atanh.o : e_atanh.c
 	$(CC) -c $(CFLAGS) $(CPPFLAGS) $(CC_REM_PIO2) $<
+
+e_atan2.o : e_atan2.c
+	$(CC) -c $(CFLAGS) $(CPPFLAGS) $(CC_REM_PIO2) $<