diff --git a/docs/api_reference/src/quantities.tex b/docs/api_reference/src/quantities.tex
index 1a44d792d..47c035972 100644
--- a/docs/api_reference/src/quantities.tex
+++ b/docs/api_reference/src/quantities.tex
@@ -197,7 +197,7 @@
 constexpr @\libconcept{Magnitude}@ auto mag_power = @\seebelownc@;
 
 inline constexpr struct @\libglobal{pi}@ final :
-    mag_constant<{u8"\U0001D70B", "pi"}, std::numbers::pi_v<long double>> {
+    mag_constant<{u8"\u03C0", "pi"}, std::numbers::pi_v<long double>> {
 } @\libglobal{pi}@;
 
 // \ref{qty.unit}, unit