diff --git a/src/read_dump.cpp b/src/read_dump.cpp
index 4be47497e0..8b5e2a6269 100644
--- a/src/read_dump.cpp
+++ b/src/read_dump.cpp
@@ -815,7 +815,7 @@ void ReadDump::process_atoms()
   double **x = atom->x;
   double **v = atom->v;
   double *q = atom->q;
-  double *lambda = atom->lambda;
+  double *apip_lambda = atom->lambda;
   double **f = atom->f;
   tagint *tag = atom->tag;
   imageint *image = atom->image;
@@ -865,8 +865,8 @@ void ReadDump::process_atoms()
         case Reader::Q:
           q[m] = fields[i][ifield];
           break;
-        case Reader::LAMBDA:
-          lambda[m] = fields[i][ifield];
+        case Reader::APIP_LAMBDA:
+          apip_lambda[m] = fields[i][ifield];
           break;
         case Reader::VY:
           v[m][1] = fields[i][ifield];
@@ -983,7 +983,7 @@ void ReadDump::process_atoms()
     tag = atom->tag;
     v = atom->v;
     q = atom->q;
-    lambda = atom->lambda;
+    apip_lambda = atom->lambda;
     image = atom->image;
 
     // set atom attributes from other dump file fields
@@ -1008,8 +1008,8 @@ void ReadDump::process_atoms()
       case Reader::Q:
         q[m] = fields[i][ifield];
         break;
-      case Reader::LAMBDA:
-        lambda[m] = fields[i][ifield];
+      case Reader::APIP_LAMBDA:
+        apip_lambda[m] = fields[i][ifield];
         break;
       case Reader::IX:
         xbox = static_cast<int> (fields[i][ifield]);
@@ -1173,8 +1173,8 @@ int ReadDump::fields_and_keywords(int narg, char **arg)
     if (type < 0) break;
     if (type == Reader::Q && !atom->q_flag)
       error->all(FLERR,"Read dump of charge property that isn't supported by atom style");
-    if (type == Reader::LAMBDA && !atom->lambda_flag)
-      error->all(FLERR,"Read dump of lambda property that isn't supported by atom style");
+    if (type == Reader::APIP_LAMBDA && !atom->lambda_flag)
+      error->all(FLERR,"Read dump of apip_lambda property that isn't supported by atom style");
     fieldtype[nfield++] = type;
     iarg++;
   }
@@ -1300,7 +1300,7 @@ int ReadDump::whichtype(char *str)
   else if (strcmp(str,"vy") == 0) type = Reader::VY;
   else if (strcmp(str,"vz") == 0) type = Reader::VZ;
   else if (strcmp(str,"q") == 0) type = Reader::Q;
-  else if (strcmp(str,"lambda") == 0) type = Reader::LAMBDA;
+  else if (strcmp(str,"apip_lambda") == 0) type = Reader::APIP_LAMBDA;
   else if (strcmp(str,"ix") == 0) type = Reader::IX;
   else if (strcmp(str,"iy") == 0) type = Reader::IY;
   else if (strcmp(str,"iz") == 0) type = Reader::IZ;
diff --git a/src/reader.h b/src/reader.h
index c82cc736c3..4b75c953cc 100644
--- a/src/reader.h
+++ b/src/reader.h
@@ -22,7 +22,7 @@ namespace LAMMPS_NS {
 
 class Reader : protected Pointers {
  public:
-  enum { ID, TYPE, X, Y, Z, VX, VY, VZ, Q, LAMBDA, IX, IY, IZ, FX, FY, FZ };
+  enum { ID, TYPE, X, Y, Z, VX, VY, VZ, Q, APIP_LAMBDA, IX, IY, IZ, FX, FY, FZ };
   enum { UNSET, NOSCALE_NOWRAP, NOSCALE_WRAP, SCALE_NOWRAP, SCALE_WRAP };
 
   Reader(class LAMMPS *);
diff --git a/src/reader_native.cpp b/src/reader_native.cpp
index 0b9d4e014e..840813dab3 100644
--- a/src/reader_native.cpp
+++ b/src/reader_native.cpp
@@ -413,8 +413,8 @@ bigint ReaderNative::read_header(double box[3][3], int &boxinfo, int &triclinic,
     else if (fieldtype[i] == Q)
       fieldindex[i] = find_label("q", labels);
 
-    else if (fieldtype[i] == LAMBDA)
-      fieldindex[i] = find_label("lambda", labels);
+    else if (fieldtype[i] == APIP_LAMBDA)
+      fieldindex[i] = find_label("apip_lambda", labels);
 
     else if (fieldtype[i] == IX)
       fieldindex[i] = find_label("ix", labels);