diff --git a/pageserver/src/tenant/ephemeral_file.rs b/pageserver/src/tenant/ephemeral_file.rs
index 02ef7166e5..1edb86f857 100644
--- a/pageserver/src/tenant/ephemeral_file.rs
+++ b/pageserver/src/tenant/ephemeral_file.rs
@@ -127,10 +127,15 @@ impl EphemeralFile {
                     self.off += n;
                     src_remaining = &src_remaining[n..];
                     if self.off == PAGE_SZ {
-                        match self.ephemeral_file.file.write_all_at(
-                            &self.ephemeral_file.mutable_tail,
-                            self.blknum as u64 * PAGE_SZ as u64,
-                        ) {
+                        match self
+                            .ephemeral_file
+                            .file
+                            .write_all_at(
+                                &self.ephemeral_file.mutable_tail,
+                                self.blknum as u64 * PAGE_SZ as u64,
+                            )
+                            .await
+                        {
                             Ok(_) => {
                                 // Pre-warm the page cache with what we just wrote.
                                 // This isn't necessary for coherency/correctness, but it's how we've always done it.
diff --git a/pageserver/src/virtual_file.rs b/pageserver/src/virtual_file.rs
index 8e4f103158..65d769e8e7 100644
--- a/pageserver/src/virtual_file.rs
+++ b/pageserver/src/virtual_file.rs
@@ -369,7 +369,7 @@ impl VirtualFile {
     }
 
     // Copied from https://doc.rust-lang.org/1.72.0/src/std/os/unix/fs.rs.html#219-235
-    pub fn write_all_at(&self, mut buf: &[u8], mut offset: u64) -> Result<(), Error> {
+    pub async fn write_all_at(&self, mut buf: &[u8], mut offset: u64) -> Result<(), Error> {
         while !buf.is_empty() {
             match self.write_at(buf, offset) {
                 Ok(0) => {