diff --git a/src/pair.cpp b/src/pair.cpp
index d41e7b706c..ff56cf4967 100644
--- a/src/pair.cpp
+++ b/src/pair.cpp
@@ -97,6 +97,7 @@ Pair::Pair(LAMMPS *lmp) : Pointers(lmp)
   tabinner_disp = sqrt(2.0);
   ftable = nullptr;
   fdisptable = nullptr;
+  trim_flag = 0;
 
   allocated = 0;
   suffix_flag = Suffix::NONE;