diff --git a/src/lmptype.h b/src/lmptype.h
index 4e62a1a7eb..de259b5952 100644
--- a/src/lmptype.h
+++ b/src/lmptype.h
@@ -103,9 +103,6 @@ typedef int64_t bigint;
 #define TAGINT_FORMAT "%d"
 #define BIGINT_FORMAT "%" PRId64
 
-#define ATOTAGINT atoi
-#define ATOBIGINT ATOLL
-
 #define LAMMPS_TAGINT LAMMPS_INT
 #define LAMMPS_TAGINT_2D LAMMPS_INT_2D
 #define LAMMPS_BIGINT LAMMPS_INT64
@@ -141,9 +138,6 @@ typedef int64_t bigint;
 #define TAGINT_FORMAT "%" PRId64
 #define BIGINT_FORMAT "%" PRId64
 
-#define ATOTAGINT ATOLL
-#define ATOBIGINT ATOLL
-
 #define LAMMPS_TAGINT LAMMPS_INT64
 #define LAMMPS_TAGINT_2D LAMMPS_INT64_2D
 #define LAMMPS_BIGINT LAMMPS_INT64
@@ -178,9 +172,6 @@ typedef int bigint;
 #define TAGINT_FORMAT "%d"
 #define BIGINT_FORMAT "%d"
 
-#define ATOTAGINT atoi
-#define ATOBIGINT atoi
-
 #define LAMMPS_TAGINT LAMMPS_INT
 #define LAMMPS_TAGINT_2D LAMMPS_INT_2D
 #define LAMMPS_BIGINT LAMMPS_INT