diff --git a/op_builder/builder.py b/op_builder/builder.py
index 16bf173ff..8396235e5 100644
--- a/op_builder/builder.py
+++ b/op_builder/builder.py
@@ -78,7 +78,7 @@ class Builder(ABC):
     @abstractmethod
     def include_dirs(self) -> List[str]:
         """
-        This function should return a list of inlcude files for extensions.
+        This function should return a list of include files for extensions.
         """
         pass
 
@@ -127,13 +127,13 @@ class Builder(ABC):
 
         if CUDA_HOME is None:
             raise RuntimeError(
-                "CUDA_HOME is not found. You need to export CUDA_HOME environment vairable or install CUDA Toolkit first in order to build CUDA extensions"
+                "CUDA_HOME is not found. You need to export CUDA_HOME environment variable or install CUDA Toolkit first in order to build CUDA extensions"
             )
 
         # make sure CUDA is available for compilation during
         cuda_available = check_cuda_availability()
         if not cuda_available:
-            raise RuntimeError("CUDA is not available on your system as torch.cuda.is_avaible() returns False.")
+            raise RuntimeError("CUDA is not available on your system as torch.cuda.is_available() returns False.")
 
         # make sure system CUDA and pytorch CUDA match, an error will raised inside the function if not
         check_system_pytorch_cuda_match(CUDA_HOME)
@@ -161,7 +161,7 @@ class Builder(ABC):
             op_module = self.import_op()
             if verbose:
                 print_rank_0(
-                    f"[extension] OP {self.prebuilt_import_path} has been compileed ahead of time, skip building.")
+                    f"[extension] OP {self.prebuilt_import_path} has been compiled ahead of time, skip building.")
         except ImportError:
             # check environment
             self.check_runtime_build_environment()