diff --git a/src/compiler/nir/nir_intrinsics.py b/src/compiler/nir/nir_intrinsics.py
index ef0975878cf..a099c53af12 100644
--- a/src/compiler/nir/nir_intrinsics.py
+++ b/src/compiler/nir/nir_intrinsics.py
@@ -654,6 +654,7 @@ system_value("aa_line_width", 1)
 # BASE=0 for global/shader, BASE=1 for local/function
 system_value("scratch_base_ptr", 0, bit_sizes=[32,64], indices=[BASE])
 system_value("constant_base_ptr", 0, bit_sizes=[32,64])
+system_value("shared_base_ptr", 0, bit_sizes=[32,64])
 
 # Driver-specific viewport scale/offset parameters.
 #
diff --git a/src/compiler/nir/nir_lower_io.c b/src/compiler/nir/nir_lower_io.c
index c7e0eb0a403..7061ad882fc 100644
--- a/src/compiler/nir/nir_lower_io.c
+++ b/src/compiler/nir/nir_lower_io.c
@@ -873,6 +873,10 @@ build_addr_for_var(nir_builder *b, nir_variable *var,
          base_addr = nir_load_constant_base_ptr(b, num_comps, bit_size);
          break;
 
+      case nir_var_mem_shared:
+         base_addr = nir_load_shared_base_ptr(b, num_comps, bit_size);
+         break;
+
       default:
          unreachable("Unsupported variable mode");
       }