diff --git a/meta/recipes-devtools/m4/m4-1.4.19.inc b/meta/recipes-devtools/m4/m4-1.4.19.inc
index fd3efa5469..3b4303b7fd 100644
--- a/meta/recipes-devtools/m4/m4-1.4.19.inc
+++ b/meta/recipes-devtools/m4/m4-1.4.19.inc
@@ -57,6 +57,7 @@ RDEPENDS:${PN}-ptest += "make coreutils diffutils bash"
 RDEPENDS:${PN}-ptest:append:libc-glibc = "\
      locale-base-fr-fr \
      locale-base-fr-fr.iso-8859-1 \
+     glibc-gconv-iso8859-1 \
 "
 
 INSANE_SKIP:${PN}-ptest += "ldflags"