diff --git a/driver/level3/meson.build b/driver/level3/meson.build
index cafe40be3..a66f2489f 100644
--- a/driver/level3/meson.build
+++ b/driver/level3/meson.build
@@ -134,6 +134,30 @@ driver_kops = [
                               '_LN', '_LT']},
     }
   },
+  { 'base': '?syrk_thread',
+    'sources': {
+        'syrk_k.c': {'mode': ['s', 'd', # 'q'],
+                              'c', 'z'], # 'x'],
+                     'addl': ['-DTHREADED_LEVEL3'],
+                     'exts': ['_UN', '_UT',
+                              '_LN', '_LT', '']},
+    }
+  },
+  { 'base': '?syrk_kernel',
+    'sources': {
+        'syrk_kernel.c': {'mode': ['s', 'd', # 'q'],
+                                   'c', 'z'], # 'x'],
+                     'exts': ['_U', '_L']},
+    }
+  },
+  { 'base': '?syr2k',
+    'sources': {
+        'syr2k_k.c': {'mode': ['s', 'd', # 'q'],
+                               'c', 'z'], # 'x'],
+                      'exts': ['_UN', '_UT',
+                               '_LN', '_LT']},
+    }
+  },
 ]
 
 # Initialize kernel configurations list
diff --git a/meson.build b/meson.build
index 9c647ab9d..b4937460b 100644
--- a/meson.build
+++ b/meson.build
@@ -268,7 +268,7 @@ ext_mappings = {
     # '_V': {'def': ['XCONJ'], 'undef': ['CONJ']},
     '_D': {'def': ['CONJ', 'XCONJ']},
     '_L': {'def': ['LOWER']},
-    '_LN': {'def': ['LEFT'], 'undef': ['TRANSA'], 'except': ['?syrk']},
+    '_LN': {'def': ['LEFT'], 'undef': ['TRANSA'], 'except': ['?syrk', '?syrk_thread', '?syr2k']},
     # Handle HEMV and HEMVREV better
     '_V': {'def': ['HEMV', 'HEMVREV', 'XCONJ'], 'undef': ['LOWER', 'CONJ']},
     '_M': {'def': ['HEMV', 'HEMVREV', 'LOWER']},