diff --git a/atomic/Makefile b/atomic/Makefile
index d83019ad8..c42fbefcc 100644
--- a/atomic/Makefile
+++ b/atomic/Makefile
@@ -102,7 +102,6 @@ MODULES = \
 ../Modules/io_global.o \
 ../Modules/kind.o \
 ../Modules/ions_base.o \
-../Modules/ions_base.o \
 ../Modules/io_files.o \
 ../Modules/pseudo_types.o \
 ../Modules/radial_grids.o \