diff --git a/c/src/lib/libbsp/sh/shsim/make/custom/simsh2-testsuite.tcfg b/c/src/lib/libbsp/sh/shsim/make/custom/simsh2-testsuite.tcfg
index 443a7a2edf..620d43dd92 100644
--- a/c/src/lib/libbsp/sh/shsim/make/custom/simsh2-testsuite.tcfg
+++ b/c/src/lib/libbsp/sh/shsim/make/custom/simsh2-testsuite.tcfg
@@ -7,6 +7,7 @@
 include: testdata/require-tick-isr.tcfg
 include: testdata/disable-intrcritical-tests.tcfg
 
+fileio
 fsdosfsname01
 iostream
 utf8proc01
diff --git a/c/src/lib/libbsp/sh/shsim/make/custom/simsh4-testsuite.tcfg b/c/src/lib/libbsp/sh/shsim/make/custom/simsh4-testsuite.tcfg
index 0113702371..848daf3b40 100644
--- a/c/src/lib/libbsp/sh/shsim/make/custom/simsh4-testsuite.tcfg
+++ b/c/src/lib/libbsp/sh/shsim/make/custom/simsh4-testsuite.tcfg
@@ -6,6 +6,7 @@
 include: testdata/require-tick-isr.tcfg
 include: testdata/disable-intrcritical-tests.tcfg
 
+fileio
 fsdosfsname01
 iostream
 utf8proc01