diff --git a/python/triton/code_gen.py b/python/triton/code_gen.py
index 7553bee55..5fd1c1be6 100644
--- a/python/triton/code_gen.py
+++ b/python/triton/code_gen.py
@@ -61,6 +61,7 @@ def mangle_fn(name, arg_tys, constants):
     mangled_constants = '_'.join([f'{i}c{key(constants[i])}' for i in sorted(constants)])
     mangled_constants = mangled_constants.replace('.', '_d_')
     mangled_constants = mangled_constants.replace("'", '_sq_')
+    mangled_constants = mangled_constants.replace("e-", '_em_')
     ret = f'{name}__{mangled_arg_names}__{mangled_constants}'
     return ret