diff --git a/src/scopmath/force.cpp b/src/scopmath/force.cpp
index aa4f80124e..e17dfb9d01 100644
--- a/src/scopmath/force.cpp
+++ b/src/scopmath/force.cpp
@@ -35,9 +35,7 @@ typedef struct Spline {
 #define SP0 (Spline*) 0
 
 static Spline* splist = SP0;     /* list of splines */
-static Spline* steplist = SP0;   /* list of steps */
 static Spline* lastspline = SP0; /* the spline used on previous call */
-static Spline* laststep = SP0;   /* the step list used on previous call */
 
 extern int DEFLT;
 
diff --git a/src/scopmath/praxis.cpp b/src/scopmath/praxis.cpp
index effb3f8844..580ba7dc63 100644
--- a/src/scopmath/praxis.cpp
+++ b/src/scopmath/praxis.cpp
@@ -143,7 +143,6 @@ int praxis_stop(int i) {
 static integer c__1 = 1;
 static integer c__2 = 2;
 static integer c__0 = 0;
-static integer c__10 = 10;
 static integer c__4 = 4;
 static integer c__3 = 3;
 
diff --git a/src/scopmath/sparse.hpp b/src/scopmath/sparse.hpp
index 8532f19721..216de7b1ec 100644
--- a/src/scopmath/sparse.hpp
+++ b/src/scopmath/sparse.hpp
@@ -719,7 +719,7 @@ int _cvode_sparse(void** v, int n, IndexArray x, Array p, int (*fun)(), double**
     auto const x_ = [&p, &x](auto arg) -> auto& {
         return p[x[arg]];
     };
-    int i, j, ierr;
+    int i, ierr;
     detail::sparse::SparseObj* so;
 
     if (!*prhs) {
diff --git a/src/scopmath/sparse_thread.hpp b/src/scopmath/sparse_thread.hpp
index e09b0daf33..43c47dd8ff 100644
--- a/src/scopmath/sparse_thread.hpp
+++ b/src/scopmath/sparse_thread.hpp
@@ -148,7 +148,6 @@ inline void prmat(SparseObj* so) {
 
 inline void free_elm(SparseObj* so) {
     unsigned i;
-    Elm *el, *elnext;
 
     /* free all elements */
     nrn_pool_freeall(so->elmpool);
@@ -709,7 +708,7 @@ int _cvode_sparse_thread(void** v, int n, IndexArray x, Array p, Callable fun, A
     auto const x_ = [&p, &x](auto arg) -> auto& {
         return p[x[arg]];
     };
-    int i, j, ierr;
+    int i, ierr;
     SparseObj* so;
 
     so = (SparseObj*) (*v);