diff --git a/client.c b/client.c
index 8456dfd8..e292df5e 100644
--- a/client.c
+++ b/client.c
@@ -67,12 +67,13 @@ version_and_features(void)
 {
     static char buf[256];
     snprintf(buf, sizeof(buf),
-             "version: %s %cpgo %cime %cgraphemes %cassertions",
+             "version: %s %cpgo %cime %cgraphemes %cassertions %cucurl",
              FOOT_VERSION,
              feature_pgo() ? '+' : '-',
              feature_ime() ? '+' : '-',
              feature_graphemes() ? '+' : '-',
-             feature_assertions() ?  '+' : '-');
+             feature_assertions() ?  '+' : '-',
+             feature_ext_underline() ?  '+' : '-');
     return buf;
 }
 
diff --git a/foot-features.h b/foot-features.h
index ad447767..8af919f2 100644
--- a/foot-features.h
+++ b/foot-features.h
@@ -37,3 +37,12 @@ static inline bool feature_graphemes(void)
     return false;
 #endif
 }
+
+static inline bool feature_ext_underline(void)
+{
+#if FOOT_EXT_UNDERLINE
+    return true;
+#else
+    return false;
+#endif
+}
diff --git a/main.c b/main.c
index 4fc8f439..b1a274e7 100644
--- a/main.c
+++ b/main.c
@@ -53,12 +53,13 @@ version_and_features(void)
 {
     static char buf[256];
     snprintf(buf, sizeof(buf),
-             "version: %s %cpgo %cime %cgraphemes %cassertions",
+             "version: %s %cpgo %cime %cgraphemes %cassertions %cucurl",
              FOOT_VERSION,
              feature_pgo() ? '+' : '-',
              feature_ime() ? '+' : '-',
              feature_graphemes() ? '+' : '-',
-             feature_assertions() ? '+' : '-');
+             feature_assertions() ? '+' : '-',
+             feature_ext_underline() ? '+' : '-');
     return buf;
 }