diff --git a/src/KIM/kim_init.cpp b/src/KIM/kim_init.cpp
index e6e4d81534..5da513d972 100644
--- a/src/KIM/kim_init.cpp
+++ b/src/KIM/kim_init.cpp
@@ -68,7 +68,6 @@
 #include "modify.h"
 #include "universe.h"
 #include "variable.h"
-#include "fmt/format.h"
 
 #include <cstring>
 
diff --git a/src/KIM/kim_interactions.cpp b/src/KIM/kim_interactions.cpp
index e902cdccfe..713f91b56c 100644
--- a/src/KIM/kim_interactions.cpp
+++ b/src/KIM/kim_interactions.cpp
@@ -67,12 +67,9 @@
 #include "input.h"
 #include "modify.h"
 #include "update.h"
-#include "fmt/format.h"
 
-#include <cstdio>
 #include <cstring>
 #include <vector>
-#include <string>
 
 extern "C" {
 #include "KIM_SimulatorHeaders.h"
diff --git a/src/KIM/kim_param.cpp b/src/KIM/kim_param.cpp
index 07d2c920b7..0927a467bf 100644
--- a/src/KIM/kim_param.cpp
+++ b/src/KIM/kim_param.cpp
@@ -64,13 +64,10 @@
 #include "input.h"
 #include "modify.h"
 #include "pair_kim.h"
-#include "utils.h"
 #include "variable.h"
-#include "fmt/format.h"
 
 #include <cstdlib>
 #include <cstring>
-#include <string>
 #include <vector>
 
 extern "C"
diff --git a/src/KIM/pair_kim.cpp b/src/KIM/pair_kim.cpp
index 40b278defc..d1eae6123b 100644
--- a/src/KIM/pair_kim.cpp
+++ b/src/KIM/pair_kim.cpp
@@ -66,12 +66,9 @@
 #include "neigh_request.h"
 #include "neighbor.h"
 #include "update.h"
-#include "utils.h"
-#include "fmt/format.h"
 
 #include <cstdlib>
 #include <cstring>
-#include <string>
 #include <vector>
 
 using namespace LAMMPS_NS;