diff --git a/contrib/40.srfi/nitro.mk b/contrib/40.srfi/nitro.mk
index e0e2a63e..c939e570 100644
--- a/contrib/40.srfi/nitro.mk
+++ b/contrib/40.srfi/nitro.mk
@@ -1,4 +1,6 @@
-CONTRIB_INITS += features socket
+CONTRIB_INITS += \
+	srfi_0 \
+	srfi_106
 CONTRIB_LIBS += \
 	contrib/40.srfi/srfi/0.scm\
 	contrib/40.srfi/srfi/1.scm\
diff --git a/contrib/40.srfi/src/0.c b/contrib/40.srfi/src/0.c
index 6d6124bc..1af710d0 100644
--- a/contrib/40.srfi/src/0.c
+++ b/contrib/40.srfi/src/0.c
@@ -1,7 +1,7 @@
 #include "picrin.h"
 
 void
-pic_init_features(pic_state *pic)
+pic_init_srfi_0(pic_state *pic)
 {
     pic_add_feature(pic, "srfi-0");
     pic_add_feature(pic, "srfi-1");
diff --git a/contrib/40.srfi/src/106.c b/contrib/40.srfi/src/106.c
index e31831a2..c6772aa1 100644
--- a/contrib/40.srfi/src/106.c
+++ b/contrib/40.srfi/src/106.c
@@ -397,7 +397,7 @@ pic_socket_call_with_socket(pic_state *pic)
 }
 
 void
-pic_init_socket(pic_state *pic)
+pic_init_srfi_106(pic_state *pic)
 {
   pic_deflibrary (pic, "(srfi 106)") {
     pic_defun_(pic, "socket?", pic_socket_socket_p);