diff --git a/src/bytecode.rs b/src/bytecode.rs
index c87bc0a..b5b3c11 100644
--- a/src/bytecode.rs
+++ b/src/bytecode.rs
@@ -21,7 +21,7 @@ pub struct CodeObject {
     pub varargs: Varargs,       // *args or *
     pub kwonlyarg_names: Vec<String>,
     pub varkeywords: Varargs, // **kwargs or **
-    pub source_path: String,
+    pub source_path: Option<String>,
     pub first_line_number: usize,
     pub obj_name: String, // Name of the object that created this code object
     pub is_generator: bool,
@@ -269,7 +269,7 @@ impl CodeObject {
         varargs: Varargs,
         kwonlyarg_names: Vec<String>,
         varkeywords: Varargs,
-        source_path: String,
+        source_path: Option<String>,
         first_line_number: usize,
         obj_name: String,
     ) -> CodeObject {
diff --git a/src/compile.rs b/src/compile.rs
index 8b806b1..0efa3ad 100644
--- a/src/compile.rs
+++ b/src/compile.rs
@@ -23,7 +23,11 @@ struct Compiler {
 }
 
 /// Compile a given sourcecode into a bytecode object.
-pub fn compile(source: &str, mode: &Mode, source_path: String) -> Result<CodeObject, CompileError> {
+pub fn compile(
+    source: &str,
+    mode: &Mode,
+    source_path: Option<String>,
+) -> Result<CodeObject, CompileError> {
     match mode {
         Mode::Exec => {
             let ast = parser::parse_program(source)?;
@@ -42,11 +46,11 @@ pub fn compile(source: &str, mode: &Mode, source_path: String) -> Result<CodeObj
 
 /// A helper function for the shared code of the different compile functions
 fn with_compiler(
-    source_path: String,
+    source_path: Option<String>,
     f: impl FnOnce(&mut Compiler) -> Result<(), CompileError>,
 ) -> Result<CodeObject, CompileError> {
     let mut compiler = Compiler::new();
-    compiler.source_path = Some(source_path);
+    compiler.source_path = source_path;
     compiler.push_new_code_object("<module>".to_string());
     f(&mut compiler)?;
     let code = compiler.pop_code_object();
@@ -55,7 +59,10 @@ fn with_compiler(
 }
 
 /// Compile a standard Python program to bytecode
-pub fn compile_program(ast: ast::Program, source_path: String) -> Result<CodeObject, CompileError> {
+pub fn compile_program(
+    ast: ast::Program,
+    source_path: Option<String>,
+) -> Result<CodeObject, CompileError> {
     with_compiler(source_path, |compiler| {
         let symbol_table = make_symbol_table(&ast)?;
         compiler.compile_program(&ast, symbol_table)
@@ -65,7 +72,7 @@ pub fn compile_program(ast: ast::Program, source_path: String) -> Result<CodeObj
 /// Compile a single Python expression to bytecode
 pub fn compile_statement_eval(
     statement: Vec<ast::LocatedStatement>,
-    source_path: String,
+    source_path: Option<String>,
 ) -> Result<CodeObject, CompileError> {
     with_compiler(source_path, |compiler| {
         let symbol_table = statements_to_symbol_table(&statement)?;
@@ -76,7 +83,7 @@ pub fn compile_statement_eval(
 /// Compile a Python program to bytecode for the context of a REPL
 pub fn compile_program_single(
     ast: ast::Program,
-    source_path: String,
+    source_path: Option<String>,
 ) -> Result<CodeObject, CompileError> {
     with_compiler(source_path, |compiler| {
         let symbol_table = make_symbol_table(&ast)?;
@@ -119,7 +126,7 @@ impl Compiler {
             Varargs::None,
             Vec::new(),
             Varargs::None,
-            self.source_path.clone().unwrap(),
+            self.source_path.clone(),
             line_number,
             obj_name,
         ));
@@ -596,7 +603,7 @@ impl Compiler {
             Varargs::from(&args.vararg),
             args.kwonlyargs.iter().map(|a| a.arg.clone()).collect(),
             Varargs::from(&args.kwarg),
-            self.source_path.clone().unwrap(),
+            self.source_path.clone(),
             line_number,
             name.to_string(),
         ));
@@ -849,7 +856,7 @@ impl Compiler {
             Varargs::None,
             vec![],
             Varargs::None,
-            self.source_path.clone().unwrap(),
+            self.source_path.clone(),
             line_number,
             name.to_string(),
         ));
@@ -1571,7 +1578,7 @@ impl Compiler {
             Varargs::None,
             vec![],
             Varargs::None,
-            self.source_path.clone().unwrap(),
+            self.source_path.clone(),
             line_number,
             name.clone(),
         ));