diff --git a/include/functions.hpp b/include/functions.hpp
index 20f2357..8cef6e4 100644
--- a/include/functions.hpp
+++ b/include/functions.hpp
@@ -60,6 +60,8 @@ FUNCTION(factorial);
 FUNCTION(ln);
 FUNCTION(exp);
 
+FUNCTION(sqrt);
+
 FUNCTION(sin);
 FUNCTION(cos);
 FUNCTION(tan);
diff --git a/src/main.cpp b/src/main.cpp
index 6c9bf97..9c3c0d8 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -59,6 +59,7 @@ int main() {
 
     ab.add_function("ln", function_ln, "(num)->num");
     ab.add_function("exp", function_exp, "(num)->num");
+    ab.add_function("sqrt", function_sqrt, "(num)->num");
 
     ab.add_function("sin", function_sin, "(num)->num");
     ab.add_function("cos", function_cos, "(num)->num");
diff --git a/src/other_functions.cpp b/src/other_functions.cpp
index beeafe8..45c9a97 100644
--- a/src/other_functions.cpp
+++ b/src/other_functions.cpp
@@ -2,4 +2,4 @@
 
 FUNCTION_MPFR(ln, log);
 FUNCTION_MPFR(exp, exp);
-
+FUNCTION_MPFR(sqrt, sqrt);