diff --git a/src/frontend/cpitf.c b/src/frontend/cpitf.c
index cfb1706d3..21c777815 100644
--- a/src/frontend/cpitf.c
+++ b/src/frontend/cpitf.c
@@ -37,7 +37,7 @@ ft_cpinit(void)
         "no",       "0",
         "FALSE",    "0",
         "pi",       "3.14159265358979323846",
-        "e",        "2.71828182844590452353",
+        "e",        "2.71828182845904523536",
         "c",        "2.997925e8",
         "i",        "0,1",
         "kelvin",   "-273.15",