diff --git a/lib/roken/roken.h.in b/lib/roken/roken.h.in
index e1902f582..e09c4ee89 100644
--- a/lib/roken/roken.h.in
+++ b/lib/roken/roken.h.in
@@ -563,6 +563,18 @@ ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
      __attribute__ ((__format__ (__printf__, 3, 0)));
 #endif
 
+#if !defined(HAVE_EVASPRINTF) || defined(NEED_EVASPRINTF_PROTO)
+#define evasprintf  rk_evasprintf
+ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
+rk_evasprintf(const char *format, va_list args);
+#endif
+
+#if !defined(HAVE_EASPRINTF) || defined(NEED_EASPRINTF_PROTO)
+#define easprintf   rk_easprintf
+ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
+rk_easprintf(const char *format, ...);
+#endif
+
 #ifndef HAVE_STRDUP
 #define strdup rk_strdup
 ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL strdup(const char *);
diff --git a/lib/roken/snprintf.c b/lib/roken/snprintf.c
index 928e4f4f3..0b99a4b6f 100644
--- a/lib/roken/snprintf.c
+++ b/lib/roken/snprintf.c
@@ -701,3 +701,30 @@ rk_vsnprintf (char *str, size_t sz, const char *format, va_list args)
     return ret;
 }
 #endif
+
+#if !defined(HAVE_EVASPRINTF) || defined(TEST_SNPRINTF)
+ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
+rk_evasprintf(const char *format, va_list args)
+{
+    char *s = NULL;
+
+    if (vasprintf(&s, format, args) == -1 || s == NULL)
+        errx(1, "Out of memory");
+    return s;
+}
+#endif
+
+#if !defined(HAVE_EASPRINTF) || defined(TEST_SNPRINTF)
+ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
+rk_easprintf(const char *format, ...)
+{
+    va_list args;
+    char *s = NULL;
+
+    va_start(args, format);
+    if (vasprintf(&s, format, args) == -1 || s == NULL)
+        errx(1, "Out of memory");
+    va_end(args);
+    return s;
+}
+#endif
diff --git a/lib/roken/version-script.map b/lib/roken/version-script.map
index be1713e82..8bee12c01 100644
--- a/lib/roken/version-script.map
+++ b/lib/roken/version-script.map
@@ -52,12 +52,14 @@ HEIMDAL_ROKEN_2.0 {
 		rk_dns_string_to_type;
 		rk_dns_type_to_string;
 		rk_dumpdata;
+		rk_easprintf;
 		rk_ecalloc;
 		rk_emalloc;
 		rk_eread;
 		rk_erealloc;
 		rk_esetenv;
 		rk_estrdup;
+		rk_evasprintf;
 		rk_ewrite;
 		rk_flock;
 		rk_fnmatch;