diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index 2480f60..a646647 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -900,6 +900,10 @@
 	$(OPENSSL) ec -pubin -in $< -out $@ -conv_form compressed
 all_final += ec_pub.comp.pem
 
+ec_224_pub.comp.pem: ec_224_pub.pem
+	$(OPENSSL) ec -pubin -in $< -out $@ -conv_form compressed
+all_final += ec_224_pub.comp.pem
+
 ec_256_pub.comp.pem: ec_256_pub.pem
 	$(OPENSSL) ec -pubin -in $< -out $@ -conv_form compressed
 all_final += ec_256_pub.comp.pem