diff --git a/src/bitmap/backend/mod.rs b/src/bitmap/backend/mod.rs
index 8d2d866..6480b0c 100644
--- a/src/bitmap/backend/mod.rs
+++ b/src/bitmap/backend/mod.rs
@@ -3,3 +3,5 @@
 
+#[cfg(any(all(test, target_has_atomic = "64"), feature = "backend-bitmap"))]
 mod atomic_bitmap;
+#[cfg(any(all(test, target_has_atomic = "64"), feature = "backend-bitmap"))]
 mod atomic_bitmap_arc;
@@ -7,3 +9,5 @@ mod slice;
 
+#[cfg(any(all(test, target_has_atomic = "64"), feature = "backend-bitmap"))]
 pub use atomic_bitmap::AtomicBitmap;
+#[cfg(any(all(test, target_has_atomic = "64"), feature = "backend-bitmap"))]
 pub use slice::{ArcSlice, RefSlice};
diff --git a/src/bitmap/backend/slice.rs b/src/bitmap/backend/slice.rs
index 383ce69..7493cff 100644
--- a/src/bitmap/backend/slice.rs
+++ b/src/bitmap/backend/slice.rs
@@ -96,2 +96,3 @@ pub type ArcSlice<B> = BaseSlice<Arc<B>>;
 #[cfg(test)]
+#[cfg(target_has_atomic = "64")]
 mod tests {
diff --git a/src/bitmap/mod.rs b/src/bitmap/mod.rs
index 10d5ef6..6f2fffa 100644
--- a/src/bitmap/mod.rs
+++ b/src/bitmap/mod.rs
@@ -16,3 +16,5 @@ use crate::{GuestMemory, GuestMemoryRegion};
 #[cfg(any(test, feature = "backend-bitmap"))]
-pub use backend::{ArcSlice, AtomicBitmap, RefSlice};
+pub use backend::{ArcSlice, RefSlice};
+#[cfg(any(all(test, target_has_atomic = "64"), feature = "backend-bitmap"))]
+pub use backend::AtomicBitmap;
 
diff --git a/src/mmap.rs b/src/mmap.rs
index 9e6dc8f..11337c0 100644
--- a/src/mmap.rs
+++ b/src/mmap.rs
@@ -644,2 +644,3 @@ mod tests {
     use crate::bitmap::tests::test_guest_memory_and_region;
+    #[cfg(target_has_atomic = "64")]
     use crate::bitmap::AtomicBitmap;
@@ -1517,3 +1518,3 @@ mod tests {
     #[test]
-    #[cfg(not(target_arch = "powerpc64"))]
+    #[cfg(all(not(target_arch = "powerpc64"), target_has_atomic = "64"))]
     fn test_dirty_tracking() {
diff --git a/src/mmap_unix.rs b/src/mmap_unix.rs
index 116b8ee..31af843 100644
--- a/src/mmap_unix.rs
+++ b/src/mmap_unix.rs
@@ -453,2 +453,3 @@ mod tests {
 
+    #[cfg(target_has_atomic = "64")]
     use crate::bitmap::AtomicBitmap;
@@ -604,2 +605,3 @@ mod tests {
         let region_size = 0x10_0000;
+        #[cfg(target_has_atomic = "64")] {
         let bitmap = AtomicBitmap::new(region_size, unsafe { NonZeroUsize::new_unchecked(0x1000) });
@@ -613,2 +615,3 @@ mod tests {
         crate::bitmap::tests::test_volatile_memory(&(builder.build().unwrap()));
+        }
     }
@@ -667,3 +670,3 @@ mod tests {
     #[test]
-    #[cfg(not(target_arch = "powerpc64"))]
+    #[cfg(all(not(target_arch = "powerpc64"), target_has_atomic = "64"))]
     fn test_dirty_tracking() {
diff --git a/src/volatile_memory.rs b/src/volatile_memory.rs
index 30e1038..be42c3b 100644
--- a/src/volatile_memory.rs
+++ b/src/volatile_memory.rs
@@ -1649,3 +1649,5 @@ mod tests {
     };
-    use crate::bitmap::{AtomicBitmap, RefSlice};
+    #[cfg(target_has_atomic = "64")]
+    use crate::bitmap::AtomicBitmap;
+    use crate::bitmap::RefSlice;
 
@@ -2296,2 +2298,3 @@ mod tests {
     #[test]
+    #[cfg(target_has_atomic = "64")]
     fn test_volatile_slice_dirty_tracking() {
@@ -2386,2 +2389,3 @@ mod tests {
     #[test]
+    #[cfg(target_has_atomic = "64")]
     fn test_volatile_ref_dirty_tracking() {
@@ -2400,2 +2404,3 @@ mod tests {
 
+    #[cfg(target_has_atomic = "64")]
     fn test_volatile_array_ref_copy_from_tracking<T>(
@@ -2426,2 +2431,3 @@ mod tests {
     #[test]
+    #[cfg(target_has_atomic = "64")]
     fn test_volatile_array_ref_dirty_tracking() {
-- 
2.39.5