diff --git a/src/GPU/fix_npt_gpu.cpp b/src/GPU/fix_npt_gpu.cpp
index 073d5dc6c1..3847f31a65 100644
--- a/src/GPU/fix_npt_gpu.cpp
+++ b/src/GPU/fix_npt_gpu.cpp
@@ -35,7 +35,7 @@ FixNPTGPU::FixNPTGPU(LAMMPS *lmp, int narg, char **arg) :
   // and thus its KE/temperature contribution should use group all
 
   id_temp = utils::strdup(std::string(id)+"_temp");
-  modify->add_compute(id_temp+" all temp");
+  modify->add_compute(std::string(id_temp)+" all temp");
   tcomputeflag = 1;
 
   // create a new compute pressure style
diff --git a/src/USER-OMP/fix_npt_omp.cpp b/src/USER-OMP/fix_npt_omp.cpp
index 54328803f4..4037dd928e 100644
--- a/src/USER-OMP/fix_npt_omp.cpp
+++ b/src/USER-OMP/fix_npt_omp.cpp
@@ -34,7 +34,6 @@ FixNPTOMP::FixNPTOMP(LAMMPS *lmp, int narg, char **arg) :
   // compute group = all since pressure is always global (group all)
   // and thus its KE/temperature contribution should use group all
 
-
   id_temp = utils::strdup(std::string(id)+"_temp");
   modify->add_compute(std::string(id_temp)+" all temp");
   tcomputeflag = 1;