diff --git a/langen.cpp b/langen.cpp
index e90f3215..4c11a865 100644
--- a/langen.cpp
+++ b/langen.cpp
@@ -354,6 +354,7 @@ int main() {
   allchars.insert("→");
   allchars.insert("⁻");
   allchars.insert("ᶻ");
+  allchars.insert("√");
 
   langPL(); langCZ(); langRU();
   langTR(); langDE(); langPT();
diff --git a/language.cpp b/language.cpp
index 8b9d3f10..70a0312d 100644
--- a/language.cpp
+++ b/language.cpp
@@ -63,10 +63,10 @@ struct fullnoun {
 
 #if !CAP_TRANS
 #if HDR
-#define NUMEXTRA 12
+#define NUMEXTRA 13
 extern const char* natchars[NUMEXTRA];
 #endif
-const char* natchars[NUMEXTRA] = {"°","é","á", "²", "½", "Θ", "δ", "π", "ϕ", "ᵈ", "∞", "⌫"};
+const char* natchars[NUMEXTRA] = {"°","é","á", "²", "½", "Θ", "δ", "π", "ϕ", "ᵈ", "∞", "⌫", "√"};
 #endif
 
 #if CAP_TRANS