diff --git a/src/hash_workspace.cu b/src/hash_workspace.cu
index d501359d..ba142aca 100644
--- a/src/hash_workspace.cu
+++ b/src/hash_workspace.cu
@@ -53,7 +53,7 @@ Hash_Workspace<TemplateConfig<AMGX_device, V, M, I>, Key_type >::~Hash_Workspace
 template< AMGX_VecPrecision V, AMGX_MatPrecision M, AMGX_IndPrecision I, typename Key_type >
 void Hash_Workspace<TemplateConfig<AMGX_device, V, M, I>, Key_type >::allocate_workspace()
 {
-    const int NUM_WARPS_IN_GRID = m_grid_size * m_max_warp_count;
+    const size_t NUM_WARPS_IN_GRID = m_grid_size * m_max_warp_count;
 
     // Allocate memory to store the keys of the device-based hashtable.
     if ( m_keys != NULL )
diff --git a/src/solvers/dense_lu_solver.cu b/src/solvers/dense_lu_solver.cu
index 900296e3..9032a38e 100644
--- a/src/solvers/dense_lu_solver.cu
+++ b/src/solvers/dense_lu_solver.cu
@@ -881,7 +881,7 @@ solver_setup(bool reuse_matrix_structure)
         // Allocate mem for cudense pivoting sequence.
         allocMem(m_ipiv, m_num_rows, false);
         // Allocate memory to store the dense A and initialize to zero.
-        allocMem(m_dense_A, m_num_cols * m_lda, true);
+        allocMem(m_dense_A, static_cast<size_t>(m_num_cols) * m_lda, true);
         csr_to_dense(); // copy sparse A to dense_A
     }