diff --git a/src/uu/dd/src/parseargs.rs b/src/uu/dd/src/parseargs.rs
index 59836b1a1..e26b34953 100644
--- a/src/uu/dd/src/parseargs.rs
+++ b/src/uu/dd/src/parseargs.rs
@@ -517,9 +517,7 @@ fn parse_bytes_no_x(full: &str, s: &str) -> Result<u64, ParseError> {
         (None, None, None) => match parser.parse_u64(s) {
             Ok(n) => (n, 1),
             Err(ParseSizeError::SizeTooBig(_)) => (u64::MAX, 1),
-            Err(ParseSizeError::InvalidSuffix(_) | ParseSizeError::ParseFailure(_)) => {
-                return Err(ParseError::InvalidNumber(full.to_string()))
-            }
+            Err(_) => return Err(ParseError::InvalidNumber(full.to_string())),
         },
         (Some(i), None, None) => (parse_bytes_only(s, i)?, 1),
         (None, Some(i), None) => (parse_bytes_only(s, i)?, 2),
diff --git a/src/uu/df/src/df.rs b/src/uu/df/src/df.rs
index 092c83812..8602d8af7 100644
--- a/src/uu/df/src/df.rs
+++ b/src/uu/df/src/df.rs
@@ -189,6 +189,7 @@ impl Options {
                         .to_string(),
                 ),
                 ParseSizeError::ParseFailure(s) => OptionsError::InvalidBlockSize(s),
+                ParseSizeError::PhysicalMem(s) => OptionsError::InvalidBlockSize(s),
             })?,
             header_mode: {
                 if matches.get_flag(OPT_HUMAN_READABLE_BINARY)
diff --git a/src/uu/du/src/du.rs b/src/uu/du/src/du.rs
index 2392497a9..bd017f1d5 100644
--- a/src/uu/du/src/du.rs
+++ b/src/uu/du/src/du.rs
@@ -1120,7 +1120,9 @@ fn format_error_message(error: &ParseSizeError, s: &str, option: &str) -> String
         ParseSizeError::InvalidSuffix(_) => {
             format!("invalid suffix in --{} argument {}", option, s.quote())
         }
-        ParseSizeError::ParseFailure(_) => format!("invalid --{} argument {}", option, s.quote()),
+        ParseSizeError::ParseFailure(_) | ParseSizeError::PhysicalMem(_) => {
+            format!("invalid --{} argument {}", option, s.quote())
+        }
         ParseSizeError::SizeTooBig(_) => format!("--{} argument {} too large", option, s.quote()),
     }
 }
diff --git a/src/uu/od/src/od.rs b/src/uu/od/src/od.rs
index 6dd75d307..fcb72c1ae 100644
--- a/src/uu/od/src/od.rs
+++ b/src/uu/od/src/od.rs
@@ -626,7 +626,9 @@ fn format_error_message(error: &ParseSizeError, s: &str, option: &str) -> String
         ParseSizeError::InvalidSuffix(_) => {
             format!("invalid suffix in --{} argument {}", option, s.quote())
         }
-        ParseSizeError::ParseFailure(_) => format!("invalid --{} argument {}", option, s.quote()),
+        ParseSizeError::ParseFailure(_) | ParseSizeError::PhysicalMem(_) => {
+            format!("invalid --{} argument {}", option, s.quote())
+        }
         ParseSizeError::SizeTooBig(_) => format!("--{} argument {} too large", option, s.quote()),
     }
 }
diff --git a/src/uu/sort/src/sort.rs b/src/uu/sort/src/sort.rs
index 0c39c2442..df72ea89d 100644
--- a/src/uu/sort/src/sort.rs
+++ b/src/uu/sort/src/sort.rs
@@ -1845,7 +1845,9 @@ fn format_error_message(error: &ParseSizeError, s: &str, option: &str) -> String
         ParseSizeError::InvalidSuffix(_) => {
             format!("invalid suffix in --{} argument {}", option, s.quote())
         }
-        ParseSizeError::ParseFailure(_) => format!("invalid --{} argument {}", option, s.quote()),
+        ParseSizeError::ParseFailure(_) | ParseSizeError::PhysicalMem(_) => {
+            format!("invalid --{} argument {}", option, s.quote())
+        }
         ParseSizeError::SizeTooBig(_) => format!("--{} argument {} too large", option, s.quote()),
     }
 }
diff --git a/src/uucore/src/lib/parser/parse_size.rs b/src/uucore/src/lib/parser/parse_size.rs
index 9247ad378..e581ec2ad 100644
--- a/src/uucore/src/lib/parser/parse_size.rs
+++ b/src/uucore/src/lib/parser/parse_size.rs
@@ -327,6 +327,9 @@ pub enum ParseSizeError {
 
     /// Overflow
     SizeTooBig(String),
+
+    /// Could not determine total physical memory size.
+    PhysicalMem(String),
 }
 
 impl Error for ParseSizeError {
@@ -335,6 +338,7 @@ impl Error for ParseSizeError {
             Self::InvalidSuffix(ref s) => s,
             Self::ParseFailure(ref s) => s,
             Self::SizeTooBig(ref s) => s,
+            Self::PhysicalMem(ref s) => s,
         }
     }
 }
@@ -342,7 +346,10 @@ impl Error for ParseSizeError {
 impl fmt::Display for ParseSizeError {
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
         let s = match self {
-            Self::InvalidSuffix(s) | Self::ParseFailure(s) | Self::SizeTooBig(s) => s,
+            Self::InvalidSuffix(s)
+            | Self::ParseFailure(s)
+            | Self::SizeTooBig(s)
+            | Self::PhysicalMem(s) => s,
         };
         write!(f, "{s}")
     }