diff --git a/src/USER-INTEL/intel_intrinsics_airebo.h b/src/USER-INTEL/intel_intrinsics_airebo.h
index d055ed549a92bc9b958a58204db61554e513eac8..4a86d8db290d096dff9ae1e16809176a6ce18930 100644
--- a/src/USER-INTEL/intel_intrinsics_airebo.h
+++ b/src/USER-INTEL/intel_intrinsics_airebo.h
@@ -744,7 +744,7 @@ struct intr_types<float,double> {
 
 #include <cassert>
 #include <immintrin.h>
-#include <cstdint>
+#include <stdint.h> // <cstdint> requires C++-11
 
 #define VEC_INLINE __attribute__((always_inline))
 
diff --git a/src/USER-INTEL/pair_airebo_intel.cpp b/src/USER-INTEL/pair_airebo_intel.cpp
index f4071903aa3a5092ad4f2ebb9755e8b15acfe755..07f33f7ebe10bdfb1fac0511b768a9eba1fa3148 100644
--- a/src/USER-INTEL/pair_airebo_intel.cpp
+++ b/src/USER-INTEL/pair_airebo_intel.cpp
@@ -23,7 +23,7 @@
 #include <cstring>
 #include <cmath>
 #include <cstdio>
-#include <cstdint>
+#include <stdint.h> // <cstdint> requires C++-11
 #include <cassert>
 #include <cstddef>
 #include "lmptype.h"
diff --git a/src/USER-OMP/pair_agni_omp.cpp b/src/USER-OMP/pair_agni_omp.cpp
index b938511656f92adaf4925edfcc25225f03269b03..e8f003ea881674165d42e15053c2766b9be8a27e 100644
--- a/src/USER-OMP/pair_agni_omp.cpp
+++ b/src/USER-OMP/pair_agni_omp.cpp
@@ -14,7 +14,7 @@
 
 #include <cmath>
 #include <cstring>
-#include <cstdint>
+#include <stdint.h> // <cstdint> requires C++-11
 #include "pair_agni_omp.h"
 #include "atom.h"
 #include "comm.h"
diff --git a/src/info.cpp b/src/info.cpp
index be832cc6f71727913091bd2c171c3a40f4620e16..65c0cd9b53dcb4f480b54d4095752b9179546a6b 100644
--- a/src/info.cpp
+++ b/src/info.cpp
@@ -51,7 +51,7 @@
 #ifdef _WIN32
 #define PSAPI_VERSION 1
 #include <windows.h>
-#include <cstdint>
+#include <stdint.h> // <cstdint> requires C++-11
 #include <psapi.h>
 #else
 #include <sys/time.h>
diff --git a/src/lmptype.h b/src/lmptype.h
index 76573faa5cd0dbad6625788d297cc51f01bd6340..3580df7b52b67ee92026fcad5f2f5a7147b3b5c8 100644
--- a/src/lmptype.h
+++ b/src/lmptype.h
@@ -37,7 +37,7 @@
 #endif
 
 #include <climits>
-#include <cstdint>
+#include <stdint.h> // <cstdint> requires C++-11
 #include <cinttypes>
 
 // grrr - IBM Power6 does not provide this def in their system header files
diff --git a/src/math_special.cpp b/src/math_special.cpp
index 78b993bb2bd45c33fc2f83e34b97771164ed3947..31567bdc77fa90bab58d307356d3a9b67aa109ba 100644
--- a/src/math_special.cpp
+++ b/src/math_special.cpp
@@ -1,5 +1,5 @@
 #include <cmath>
-#include <cstdint>
+#include <stdint.h> // <cstdint> requires C++-11
 #include "math_special.h"
 
 using namespace LAMMPS_NS;
diff --git a/src/timer.cpp b/src/timer.cpp
index 99468582afcc70ba8e6f1b4ef8024e6a20e82bac..65cb6ab5d8fef698784258a1c80220848f96d9bb 100644
--- a/src/timer.cpp
+++ b/src/timer.cpp
@@ -22,7 +22,7 @@
 
 #ifdef _WIN32
 #include <windows.h>
-#include <cstdint>
+#include <stdint.h> // <cstdint> requires C++-11
 #else
 #include <sys/time.h>
 #include <sys/resource.h>