diff --git a/include/strv.h b/include/strv.h
index 52862989a..260ad12d5 100644
--- a/include/strv.h
+++ b/include/strv.h
@@ -13,6 +13,7 @@ unsigned strv_length(char * const *l);
 int strv_extend_strv(char ***a, char **b);
 int strv_extend_strv_concat(char ***a, char **b, const char *suffix);
 int strv_extend(char ***l, const char *value);
+int strv_extendv(char ***l, const char *format, va_list ap);
 int strv_extendf(char ***l, const char *format, ...)
 			__attribute__ ((__format__ (__printf__, 2, 0)));
 int strv_push(char ***l, char *value);
diff --git a/lib/strv.c b/lib/strv.c
index e030033b6..ddc2a0c5d 100644
--- a/lib/strv.c
+++ b/lib/strv.c
@@ -373,6 +373,17 @@ int strv_extendf(char ***l, const char *format, ...) {
         return strv_consume(l, x);
 }
 
+int strv_extendv(char ***l, const char *format, va_list ap) {
+        char *x;
+        int r;
+
+        r = vasprintf(&x, format, ap);
+        if (r < 0)
+                return -ENOMEM;
+
+        return strv_consume(l, x);
+}
+
 char **strv_reverse(char **l) {
         unsigned n, i;