diff --git a/fuzzers/wcet_qemu_sys/src/showmap.rs b/fuzzers/wcet_qemu_sys/src/showmap.rs
index 22535170c7..8459f782de 100644
--- a/fuzzers/wcet_qemu_sys/src/showmap.rs
+++ b/fuzzers/wcet_qemu_sys/src/showmap.rs
@@ -293,9 +293,9 @@ fn fuzz(
         let target = input.target_bytes();
         let mut buf = target.as_slice();
         let mut len = buf.len();
-        if len > 4096 {
-            buf = &buf[0..4096];
-            len = 4096;
+        if len > 32 {
+            buf = &buf[0..32];
+            len = 32;
         }
 
         unsafe {