diff --git a/Kernel/ProcessSpecificExposed.cpp b/Kernel/ProcessSpecificExposed.cpp
index fec05d7be1..6189168d7d 100644
--- a/Kernel/ProcessSpecificExposed.cpp
+++ b/Kernel/ProcessSpecificExposed.cpp
@@ -126,16 +126,16 @@ ErrorOr<NonnullRefPtr<Inode>> Process::lookup_file_descriptions_directory(const
 ErrorOr<void> Process::procfs_get_pledge_stats(KBufferBuilder& builder) const
 {
     JsonObjectSerializer obj { builder };
-#define __ENUMERATE_PLEDGE_PROMISE(x) \
-    if (has_promised(Pledge::x)) {    \
-        if (!builder.is_empty())      \
-            builder.append(' ');      \
-        builder.append(#x);           \
+#define __ENUMERATE_PLEDGE_PROMISE(x)     \
+    if (has_promised(Pledge::x)) {        \
+        if (!builder.is_empty())          \
+            TRY(builder.try_append(' ')); \
+        TRY(builder.try_append(#x));      \
     }
     if (has_promises()) {
         StringBuilder builder;
         ENUMERATE_PLEDGE_PROMISES
-        obj.add("promises", builder.build());
+        obj.add("promises", builder.string_view());
     }
 #undef __ENUMERATE_PLEDGE_PROMISE
     obj.finish();