diff --git a/meta/recipes-devtools/tcltk/tcl_9.1.0.bb b/meta/recipes-devtools/tcltk/tcl_9.1.0.bb
index 6e8a97c729..77b6270f22 100644
--- a/meta/recipes-devtools/tcltk/tcl_9.1.0.bb
+++ b/meta/recipes-devtools/tcltk/tcl_9.1.0.bb
@@ -85,7 +85,7 @@ do_install_ptest() {
 
 do_install_ptest:append:libc-musl () {
 	# Assumes locales other than provided by musl-locales
-	sed -i '/SKIP="$SKIP.*$/a # unixInit-3* is suppressed due to hardcoded locale assumptions\nSKIP="$SKIP unixInit-3\\\*"' ${D}${PTEST_PATH}/run-ptest
+	sed -i '/^SKIP="$SKIP.*$/a # unixInit-3* is suppressed due to hardcoded locale assumptions\nSKIP="$SKIP unixInit-3\\\*"' ${D}${PTEST_PATH}/run-ptest
 }
 
 # Fix some paths that might be used by Tcl extensions
diff --git a/meta/recipes-devtools/tcltk8/tcl8_8.6.18.bb b/meta/recipes-devtools/tcltk8/tcl8_8.6.18.bb
index 2094c9935a..9199f635f4 100644
--- a/meta/recipes-devtools/tcltk8/tcl8_8.6.18.bb
+++ b/meta/recipes-devtools/tcltk8/tcl8_8.6.18.bb
@@ -86,7 +86,7 @@ do_install_ptest() {
 
 do_install_ptest:append:libc-musl () {
 	# Assumes locales other than provided by musl-locales
-	sed -i '/SKIP="$SKIP.*$/a # unixInit-3* is suppressed due to hardcoded locale assumptions\nSKIP="$SKIP unixInit-3\\\*"' ${D}${PTEST_PATH}/run-ptest
+	sed -i '/^SKIP="$SKIP.*$/a # unixInit-3* is suppressed due to hardcoded locale assumptions\nSKIP="$SKIP unixInit-3\\\*"' ${D}${PTEST_PATH}/run-ptest
 }
 
 # Fix some paths that might be used by Tcl extensions