diff --git a/block/src/qcow/qcow_raw_file.rs b/block/src/qcow/qcow_raw_file.rs
index 4bac118ad..ba985c1a2 100644
--- a/block/src/qcow/qcow_raw_file.rs
+++ b/block/src/qcow/qcow_raw_file.rs
@@ -24,7 +24,7 @@ impl QcowRawFile {
     /// Creates a `QcowRawFile` from the given `File`, `None` is returned if `cluster_size` is not
     /// a power of two.
     pub fn from(file: RawFile, cluster_size: u64) -> Option<Self> {
-        if cluster_size.count_ones() != 1 {
+        if !cluster_size.is_power_of_two() {
             return None;
         }
         Some(QcowRawFile {
diff --git a/pci/src/configuration.rs b/pci/src/configuration.rs
index 7fb819d21..3e612edb7 100644
--- a/pci/src/configuration.rs
+++ b/pci/src/configuration.rs
@@ -734,7 +734,7 @@ impl PciConfiguration {
             return Err(Error::BarInUse(bar_idx));
         }
 
-        if config.size.count_ones() != 1 {
+        if !config.size.is_power_of_two() {
             return Err(Error::BarSizeInvalid(config.size));
         }
 
@@ -806,7 +806,7 @@ impl PciConfiguration {
             return Err(Error::RomBarInUse(bar_idx));
         }
 
-        if config.size.count_ones() != 1 {
+        if !config.size.is_power_of_two() {
             return Err(Error::RomBarSizeInvalid(config.size));
         }
 
diff --git a/vm-virtio/src/queue.rs b/vm-virtio/src/queue.rs
index 285692af6..4e55cc4b5 100644
--- a/vm-virtio/src/queue.rs
+++ b/vm-virtio/src/queue.rs
@@ -178,7 +178,7 @@ pub mod testing {
         // We try to make sure things are aligned properly :-s
         pub fn new(start: GuestAddress, mem: &'a GuestMemoryMmap, qsize: u16) -> Self {
             // power of 2?
-            assert!(qsize > 0 && qsize & (qsize - 1) == 0);
+            assert!(qsize.is_power_of_two());
 
             let mut dtable = Vec::with_capacity(qsize as usize);