diff --git a/src/kernel/jsonconf.test.c b/src/kernel/jsonconf.test.c
index cdc396a31..1547fde45 100644
--- a/src/kernel/jsonconf.test.c
+++ b/src/kernel/jsonconf.test.c
@@ -12,7 +12,11 @@
 #include "spell.h"
 #include "order.h"
 #include "terrain.h"
+
+#include "prefix.h"
+
 #include "util/language.h"
+
 #include <CuTest.h>
 #include <cJSON.h>
 #include <tests.h>
@@ -88,7 +92,10 @@ static void test_prefixes(CuTest * tc)
 
     test_cleanup();
     json_config(json);
-    // CuAssertStrEquals("dark", get_prefix("snow"));
+    CuAssertPtrNotNull(tc, race_prefixes);
+    CuAssertStrEquals(tc, "snow", race_prefixes[0]);
+    CuAssertStrEquals(tc, "dark", race_prefixes[2]);
+    CuAssertPtrEquals(tc, 0, race_prefixes[3]);
     test_cleanup();
 }
 
diff --git a/src/prefix.c b/src/prefix.c
index 072e573ae..ee9494e61 100644
--- a/src/prefix.c
+++ b/src/prefix.c
@@ -1,3 +1,4 @@
+#include <platform.h>
 #include "prefix.h"
 
 #include <stddef.h>