diff --git a/examples/Runlen.cpp b/examples/Runlen.cpp
index 70267b4..dcfe123 100644
--- a/examples/Runlen.cpp
+++ b/examples/Runlen.cpp
@@ -48,7 +48,7 @@ void printBytes(const char* bytes) {
 #define MAX_STR_LEN 3
 
 TEST(Runlength, EncodeDecode) {
-  char* original = DeepState_CStrUpToLen(MAX_STR_LEN);
+  char* original = DeepState_CStr(MAX_STR_LEN);
   char* encoded = encode(original);
   char* roundtrip = decode(encoded);
   if (!(strncmp(roundtrip, original, MAX_STR_LEN) == 0)) {