diff --git a/corsika/framework/units/quantity_io_celsius.hpp b/corsika/framework/units/quantity_io_celsius.hpp
index cc145ecdfe073814c089e8a746c357a8ee189813..354ea74d64c2db4284b7fc6d29df59180b2bc7c5 100644
--- a/corsika/framework/units/quantity_io_celsius.hpp
+++ b/corsika/framework/units/quantity_io_celsius.hpp
@@ -22,14 +22,14 @@
 namespace phys { namespace units {
 
 /**
- * celsius, [°C].
+ * celsius, [C].
  */
 template<>
 struct unit_info< thermodynamic_temperature_d >
 {
     static bool        single() { return true; }
     static std::string name()   { return "celsius"; }
-    static std::string symbol() { return "°C"; }
+    static std::string symbol() { return "C"; }
 };
 
 namespace literals {
diff --git a/corsika/framework/units/quantity_io_engineering.hpp b/corsika/framework/units/quantity_io_engineering.hpp
index 16b4be8f59ddc8f9676604063054029fb894913e..b6665370da9c1a8462c3da4af8fd15148dbc565f 100644
--- a/corsika/framework/units/quantity_io_engineering.hpp
+++ b/corsika/framework/units/quantity_io_engineering.hpp
@@ -31,7 +31,7 @@
 #include <sstream>
 
 /*
- * Note: micro, µ, may not work everywhere, so you can define a glyph yourself:
+ * Note: micro, may not work everywhere, so you can define a glyph yourself:
  */
 #ifndef ENG_FORMAT_MICRO_GLYPH
 # define ENG_FORMAT_MICRO_GLYPH "u"