diff --git a/src/styling.rs b/src/styling.rs
index 1e77774..d1449a3 100644
--- a/src/styling.rs
+++ b/src/styling.rs
@@ -433,7 +433,9 @@ mod conversions {
 
     #[inline]
     pub fn is_upper_greek(c: char) -> bool {
-        matches!(c, 'Α'..='Ω' | '∇' | 'ϴ')
+        // The last character is U+2126 OHM SIGN, which canonically
+        // decomposes to the regular capital Omega (U+03A9).
+        matches!(c, 'Α'..='Ω' | '∇' | 'ϴ' | 'Ω')
     }
 
     #[inline]
@@ -463,6 +465,7 @@ mod conversions {
             'ϴ' => 0x1D2C5,
             'Σ'..='Ω' => 0x1D317,
             '∇' => 0x1B4BA,
+            'Ω' => 0x1B59A,
             'α'..='ω' => 0x1D311,
             // Additional bold Greek symbols (U+1D6DB..U+1D6E1)
             '∂' => 0x1B4D9,
@@ -500,6 +503,7 @@ mod conversions {
             'ϴ' => 0x1D2FF,
             'Σ'..='Ω' => 0x1D351,
             '∇' => 0x1B4F4,
+            'Ω' => 0x1B5D4,
             'α'..='ω' => 0x1D34B,
             // Additional italic Greek symbols (U+1D715..U+1D71B)
             '∂' => 0x1B513,
@@ -525,6 +529,7 @@ mod conversions {
             'ϴ' => 0x1D339,
             'Σ'..='Ω' => 0x1D38B,
             '∇' => 0x1B52E,
+            'Ω' => 0x1B60E,
             'α'..='ω' => 0x1D385,
             // Additional bold italic Greek symbols (U+1D74F..U+1D755)
             '∂' => 0x1B54D,
@@ -628,6 +633,7 @@ mod conversions {
             'ϴ' => 0x1D373,
             'Σ'..='Ω' => 0x1D3C5,
             '∇' => 0x1B568,
+            'Ω' => 0x1B648,
             'α'..='ω' => 0x1D3BF,
             // Additional sans-serif bold Greek symbols (U+1D789..U+1D78F)
             '∂' => 0x1B587,
@@ -666,6 +672,7 @@ mod conversions {
             'ϴ' => 0x1D3AD,
             'Σ'..='Ω' => 0x1D3FF,
             '∇' => 0x1B5A2,
+            'Ω' => 0x1B682,
             'α'..='ω' => 0x1D3F9,
             // Additional sans-serif bold italic Greek symbols (U+1D7C3..U+1D7C9)
             '∂' => 0x1B5C1,
@@ -940,3 +947,26 @@ mod conversions {
         apply_delta(c, delta)
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    /// U+2126 OHM SIGN canonically decomposes to U+03A9 GREEK CAPITAL LETTER
+    /// OMEGA and should therefore be styled the same way.
+    #[test]
+    fn ohm_sign_styles_like_capital_omega() {
+        const OHM: char = '\u{2126}';
+        const OMEGA: char = '\u{03A9}';
+
+        for f in [
+            conversions::to_bold,
+            conversions::to_italic,
+            conversions::to_bold_italic,
+            conversions::to_sans_serif_bold,
+            conversions::to_sans_serif_bold_italic,
+        ] {
+            assert_eq!(f(OHM), f(OMEGA))
+        }
+    }
+}