diff --git a/src/GPU/fix_gpu.cpp b/src/GPU/fix_gpu.cpp
index 843bff2a35..f8ce12f1d4 100644
--- a/src/GPU/fix_gpu.cpp
+++ b/src/GPU/fix_gpu.cpp
@@ -148,9 +148,7 @@ FixGPU::FixGPU(LAMMPS *lmp, int narg, char **arg) :
       iarg += 2;
     } else if (strcmp(arg[iarg],"newton") == 0) {
       if (iarg+2 > narg) error->all(FLERR,"Illegal package gpu command");
-      if (strcmp(arg[iarg+1],"off") == 0) newtonflag = 0;
-      else if (strcmp(arg[iarg+1],"on") == 0) newtonflag = 1;
-      else error->all(FLERR,"Illegal package gpu command");
+      newtonflag = utils::logical(FLERR,arg[iarg+1],false,lmp);
       iarg += 2;
     } else if (strcmp(arg[iarg],"binsize") == 0) {
       if (iarg+2 > narg) error->all(FLERR,"Illegal package gpu command");
@@ -190,9 +188,7 @@ FixGPU::FixGPU(LAMMPS *lmp, int narg, char **arg) :
       iarg += 2;
     } else if (strcmp(arg[iarg],"pair/only") == 0) {
       if (iarg+2 > narg) error->all(FLERR,"Illegal package gpu command");
-      if (strcmp(arg[iarg+1],"off") == 0) pair_only_flag = 0;
-      else if (strcmp(arg[iarg+1],"on") == 0) pair_only_flag = 1;
-      else error->all(FLERR,"Illegal package gpu command");
+      pair_only_flag = utils::logical(FLERR,arg[iarg+1],false,lmp);
       iarg += 2;
     } else if (strcmp(arg[iarg],"ocl_args") == 0) {
       if (iarg+2 > narg) error->all(FLERR,"Illegal package gpu command");
@@ -203,7 +199,7 @@ FixGPU::FixGPU(LAMMPS *lmp, int narg, char **arg) :
 
   #if (LAL_USE_OMP == 0)
   if (nthreads > 1)
-    error->all(FLERR,"No OpenMP support compiled in");
+    error->all(FLERR,"No OpenMP support compiled into the GPU package");
   #else
   if (nthreads > 0) {
     omp_set_num_threads(nthreads);
diff --git a/src/INTEL/fix_intel.cpp b/src/INTEL/fix_intel.cpp
index d0633d7791..de17c02864 100644
--- a/src/INTEL/fix_intel.cpp
+++ b/src/INTEL/fix_intel.cpp
@@ -118,9 +118,7 @@ FixIntel::FixIntel(LAMMPS *lmp, int narg, char **arg) :  Fix(lmp, narg, arg)
       iarg += 2;
     } else if (strcmp(arg[iarg], "ghost") == 0) {
       if (iarg+2 > narg) error->all(FLERR,"Illegal package intel command");
-      if (strcmp(arg[iarg+1],"yes") == 0) _offload_ghost = 1;
-      else if (strcmp(arg[iarg+1],"no") == 0) _offload_ghost = 0;
-      else error->all(FLERR,"Illegal package intel command");
+      _offload_ghost = utils::logical(FLERR,arg[iarg+1],false,lmp);
       iarg += 2;
     } else if (strcmp(arg[iarg], "tpc") == 0) {
       if (iarg+2 > narg) error->all(FLERR,"Illegal package intel command");
@@ -135,9 +133,7 @@ FixIntel::FixIntel(LAMMPS *lmp, int narg, char **arg) :  Fix(lmp, narg, arg)
       iarg++;
     } else if (strcmp(arg[iarg], "lrt") == 0) {
       if (iarg+2 > narg) error->all(FLERR,"Illegal package intel command");
-      if (strcmp(arg[iarg+1],"yes") == 0) _lrt = 1;
-      else if (strcmp(arg[iarg+1],"no") == 0) _lrt = 0;
-      else error->all(FLERR,"Illegal package intel command");
+      _lrt = utils::logical(FLERR,arg[iarg+1],false,lmp);
       iarg += 2;
     }
 
diff --git a/src/OPENMP/fix_omp.cpp b/src/OPENMP/fix_omp.cpp
index 2b7e7eeaf9..ec5b1d5be0 100644
--- a/src/OPENMP/fix_omp.cpp
+++ b/src/OPENMP/fix_omp.cpp
@@ -99,9 +99,7 @@ FixOMP::FixOMP(LAMMPS *lmp, int narg, char **arg)
   while (iarg < narg) {
     if (strcmp(arg[iarg],"neigh") == 0) {
       if (iarg+2 > narg) error->all(FLERR,"Illegal package omp command");
-      if (strcmp(arg[iarg+1],"yes") == 0) _neighbor = true;
-      else if (strcmp(arg[iarg+1],"no") == 0) _neighbor = false;
-      else error->all(FLERR,"Illegal package omp command");
+      _neighbor = utils::logical(FLERR,arg[iarg+1],false,lmp) != 0;
       iarg += 2;
     } else error->all(FLERR,"Illegal package omp command");
   }