diff --git a/rtems/config/4.11/rtems-m32c.bset b/rtems/config/4.11/rtems-m32c.bset
index 765c050..d7f7e64 100644
--- a/rtems/config/4.11/rtems-m32c.bset
+++ b/rtems/config/4.11/rtems-m32c.bset
@@ -24,6 +24,11 @@
 #
 %define enable_cxx 0
 
+#
+# Disable building ICONV support
+#
+%define with_iconv 0
+
 #
 # Set the build flags to work around the defaults in the
 # compiler that cause ICE.