diff --git a/src/gallium/frontends/rusticl/core/program.rs b/src/gallium/frontends/rusticl/core/program.rs
index 15519e5cf99..c4143d1e23a 100644
--- a/src/gallium/frontends/rusticl/core/program.rs
+++ b/src/gallium/frontends/rusticl/core/program.rs
@@ -60,7 +60,7 @@ fn get_disk_cache() -> &'static Option<DiskCache> {
     ];
     unsafe {
         DISK_CACHE_ONCE.call_once(|| {
-            DISK_CACHE = DiskCache::new("rusticl", &func_ptrs, 0);
+            DISK_CACHE = DiskCache::new(c"rusticl", &func_ptrs, 0);
         });
         &*addr_of!(DISK_CACHE)
     }
diff --git a/src/gallium/frontends/rusticl/mesa/util/disk_cache.rs b/src/gallium/frontends/rusticl/mesa/util/disk_cache.rs
index ef0619eaa63..04080b4872e 100644
--- a/src/gallium/frontends/rusticl/mesa/util/disk_cache.rs
+++ b/src/gallium/frontends/rusticl/mesa/util/disk_cache.rs
@@ -1,7 +1,7 @@
 use libc_rust_gen::free;
 use mesa_rust_gen::*;
 
-use std::ffi::{c_void, CString};
+use std::ffi::{c_void, CStr};
 use std::ops::Deref;
 use std::ptr;
 use std::ptr::NonNull;
@@ -75,8 +75,7 @@ impl DiskCacheBorrowed {
 }
 
 impl DiskCache {
-    pub fn new(name: &str, func_ptrs: &[*mut c_void], flags: u64) -> Option<Self> {
-        let c_name = CString::new(name).unwrap();
+    pub fn new(name: &CStr, func_ptrs: &[*mut c_void], flags: u64) -> Option<Self> {
         let mut sha_ctx = SHA1_CTX::default();
         let mut sha = [0; SHA1_DIGEST_LENGTH as usize];
         let mut cache_id = [0; SHA1_DIGEST_STRING_LENGTH as usize];
@@ -91,7 +90,7 @@ impl DiskCache {
             }
             SHA1Final(&mut sha, &mut sha_ctx);
             mesa_bytes_to_hex(cache_id.as_mut_ptr(), sha.as_ptr(), sha.len() as u32);
-            disk_cache_create(c_name.as_ptr(), cache_id.as_ptr(), flags)
+            disk_cache_create(name.as_ptr(), cache_id.as_ptr(), flags)
         };
 
         DiskCacheBorrowed::from_ptr(cache).map(|c| Self { inner: c })