diff --git a/src/angle_hybrid.cpp b/src/angle_hybrid.cpp
index 66531005cd..b3ca095795 100644
--- a/src/angle_hybrid.cpp
+++ b/src/angle_hybrid.cpp
@@ -178,7 +178,7 @@ void AngleHybrid::allocate()
 
 void AngleHybrid::settings(int narg, char **arg)
 {
-  int i, m, istyle;
+  int i, m;
 
   if (narg < 1) utils::missing_cmd_args(FLERR, "angle_style hybrid", error);
 
diff --git a/src/bond_hybrid.cpp b/src/bond_hybrid.cpp
index 9b061ccf52..5410e9a98b 100644
--- a/src/bond_hybrid.cpp
+++ b/src/bond_hybrid.cpp
@@ -171,7 +171,7 @@ void BondHybrid::allocate()
 
 void BondHybrid::settings(int narg, char **arg)
 {
-  int i, m, istyle;
+  int i, m;
 
   if (narg < 1) utils::missing_cmd_args(FLERR, "bond_style hybrid", error);
 
diff --git a/src/dihedral_hybrid.cpp b/src/dihedral_hybrid.cpp
index 6103a3bec8..9925df6f81 100644
--- a/src/dihedral_hybrid.cpp
+++ b/src/dihedral_hybrid.cpp
@@ -179,7 +179,7 @@ void DihedralHybrid::allocate()
 
 void DihedralHybrid::settings(int narg, char **arg)
 {
-  int i, m, istyle;
+  int i, m;
 
   if (narg < 1) utils::missing_cmd_args(FLERR, "dihedral_style hybrid", error);
 
diff --git a/src/improper_hybrid.cpp b/src/improper_hybrid.cpp
index 9708935c8c..9b97c82957 100644
--- a/src/improper_hybrid.cpp
+++ b/src/improper_hybrid.cpp
@@ -179,7 +179,7 @@ void ImproperHybrid::allocate()
 
 void ImproperHybrid::settings(int narg, char **arg)
 {
-  int i, m, istyle;
+  int i, m;
 
   if (narg < 1) utils::missing_cmd_args(FLERR, "improper_style hybrid", error);