diff --git a/CHANGELOG.md b/CHANGELOG.md
index bf69d3f..6f94140 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# Version 3.0.1 : Bug fix
+Fix stackoverflow on custom function call with same name 
+
 # Version 3.0.0 : Symbolic calculation!
 Version 3.0.0, at last! (if you've seen the PR for it it's been sitting for more
 than three weeks!) 
diff --git a/Cargo.lock b/Cargo.lock
index 3f3b36e..b1ed428 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -221,7 +221,7 @@ checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
 
 [[package]]
 name = "mini-calc"
-version = "3.0.0"
+version = "3.0.1"
 dependencies = [
  "ansi_term",
  "atty",
diff --git a/Cargo.toml b/Cargo.toml
index 66bdd89..db06af7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mini-calc"
-version = "3.0.0"
+version = "3.0.1"
 license = "GPL-3.0-or-later"
 description = "A fully-featured minimalistic configurable rust calculator"
 homepage = "https://calc.nwa2coco.fr"
diff --git a/src/configuration/loader.rs b/src/configuration/loader.rs
index 5417676..399053a 100644
--- a/src/configuration/loader.rs
+++ b/src/configuration/loader.rs
@@ -131,7 +131,7 @@ pub fn load_color(string: String) -> Color {
 
 pub fn replace_variable(str: String) -> String {
     str.replace("%author%", "Charlotte Thomas")
-        .replace("%version%", "v3.0.0")
+        .replace("%version%", "v3.0.1")
         .to_string()
 }
 
diff --git a/src/functions/function.rs b/src/functions/function.rs
index c51daf0..19e9e42 100644
--- a/src/functions/function.rs
+++ b/src/functions/function.rs
@@ -56,8 +56,9 @@ pub fn apply_operator_reverse(
 }
 
 pub fn assign(s: Parameters, s2: Parameters) -> (String, Parameters) {
-    match s {
-        Identifier(s) => (s, s2),
+    match (s, s2.clone()) {
+        (Identifier(s), Identifier(s2)) if s == s2 => ("".to_string(), Identifier(s2)),
+        (Identifier(s), _) => (s, s2),
         _ => ("".to_string(), s2),
     }
 }
diff --git a/src/interpreting/stdlib.rs b/src/interpreting/stdlib.rs
index 8c602c9..92a4ef5 100644
--- a/src/interpreting/stdlib.rs
+++ b/src/interpreting/stdlib.rs
@@ -75,9 +75,16 @@ pub fn exec(
                             },
                         }
                     }
-                    names.iter().zip(lst).for_each(|(name, param)| {
-                        sram.insert(name.to_string(), param);
-                    });
+                    names
+                        .iter()
+                        .zip(lst)
+                        .filter(|(name, param)| match param {
+                            Parameters::Identifier(s) => s.as_str() != name.as_str(),
+                            _ => true,
+                        })
+                        .for_each(|(name, param)| {
+                            sram.insert(name.to_string(), param);
+                        });
                     interpret(ast, &mut sram, &mut HashMap::new())
                 }
             }
diff --git a/src/main.rs b/src/main.rs
index 364154a..6271ee0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -263,7 +263,7 @@ fn handle_config(line: &str, config: Config) -> (String, Option<Config>) {
 fn main() {
     let mut args: Args = env::args();
 
-    let version: String = "v3.0.0".to_string();
+    let version: String = "v3.0.1".to_string();
     if args.len() > 1 || !atty::is(Stream::Stdin) {
         let mut a = vec![];