diff --git a/test/core/security/print_google_default_creds_token.c b/test/core/security/print_google_default_creds_token.c
index 157b7bf5ff3c73e278a54427a39fa08c60536f5a..e5eb2e2e7ed4ec8b61dab20a6e718b0a260a51c7 100644
--- a/test/core/security/print_google_default_creds_token.c
+++ b/test/core/security/print_google_default_creds_token.c
@@ -45,6 +45,7 @@
 #include "src/core/lib/security/credentials/composite/composite_credentials.h"
 #include "src/core/lib/security/credentials/credentials.h"
 #include "src/core/lib/support/string.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
 
 typedef struct {
   gpr_mu *mu;