diff --git a/serde_derive/Cargo.toml b/serde_derive/Cargo.toml
index 1897cb1a..46246bb6 100644
--- a/serde_derive/Cargo.toml
+++ b/serde_derive/Cargo.toml
@@ -24,7 +24,7 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = "2.0.24"
+syn = "2.0.25"
 
 [dev-dependencies]
 serde = { version = "1.0", path = "../serde" }
diff --git a/serde_derive/src/internals/attr.rs b/serde_derive/src/internals/attr.rs
index bff82191..42212a64 100644
--- a/serde_derive/src/internals/attr.rs
+++ b/serde_derive/src/internals/attr.rs
@@ -1418,6 +1418,13 @@ fn get_lit_str2(
         ..
     }) = value
     {
+        let suffix = lit.suffix();
+        if !suffix.is_empty() {
+            cx.error_spanned_by(
+                lit,
+                format!("unexpected suffix `{}` on string literal", suffix),
+            );
+        }
         Ok(Some(lit.clone()))
     } else {
         cx.error_spanned_by(
diff --git a/serde_derive_internals/Cargo.toml b/serde_derive_internals/Cargo.toml
index 703a43cb..eb084af6 100644
--- a/serde_derive_internals/Cargo.toml
+++ b/serde_derive_internals/Cargo.toml
@@ -17,7 +17,7 @@ path = "lib.rs"
 [dependencies]
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = { version = "2.0.24", default-features = false, features = ["clone-impls", "derive", "parsing", "printing"] }
+syn = { version = "2.0.25", default-features = false, features = ["clone-impls", "derive", "parsing", "printing"] }
 
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]
diff --git a/test_suite/tests/ui/malformed/str_suffix.rs b/test_suite/tests/ui/malformed/str_suffix.rs
new file mode 100644
index 00000000..836842ee
--- /dev/null
+++ b/test_suite/tests/ui/malformed/str_suffix.rs
@@ -0,0 +1,10 @@
+use serde::Serialize;
+
+#[derive(Serialize)]
+#[serde(bound = ""huh)]
+pub struct Struct {
+    #[serde(rename = ""what)]
+    pub field: i32,
+}
+
+fn main() {}
diff --git a/test_suite/tests/ui/malformed/str_suffix.stderr b/test_suite/tests/ui/malformed/str_suffix.stderr
new file mode 100644
index 00000000..3d4beae6
--- /dev/null
+++ b/test_suite/tests/ui/malformed/str_suffix.stderr
@@ -0,0 +1,11 @@
+error: unexpected suffix `huh` on string literal
+ --> tests/ui/malformed/str_suffix.rs:4:17
+  |
+4 | #[serde(bound = ""huh)]
+  |                 ^^^^^
+
+error: unexpected suffix `what` on string literal
+ --> tests/ui/malformed/str_suffix.rs:6:22
+  |
+6 |     #[serde(rename = ""what)]
+  |                      ^^^^^^