diff --git a/lib/ffi/inline/compilers/gcc.rb b/lib/ffi/inline/compilers/gcc.rb
index b1a3f88..d2c0431 100644
--- a/lib/ffi/inline/compilers/gcc.rb
+++ b/lib/ffi/inline/compilers/gcc.rb
@@ -19,7 +19,7 @@ def compile (code, libraries = [])
     @code      = code
     @libraries = libraries
 
-    return output if File.exists?(output)
+    return output if File.exist?(output)
 
     cmd = if RbConfig::CONFIG['target_os'] =~ /mswin|mingw/
       "sh -c '#{ldshared} #{ENV['CFLAGS']} -o #{output.shellescape} #{input.shellescape} #{libs}' 2>>#{log.shellescape}"
@@ -41,7 +41,7 @@ def digest
 
   def input
     File.join(Inline.directory, "#{digest}.c").tap {|path|
-      File.open(path, 'w') { |f| f.write(@code) } unless File.exists?(path)
+      File.open(path, 'w') { |f| f.write(@code) } unless File.exist?(path)
     }
   end
 
diff --git a/lib/ffi/inline/compilers/gxx.rb b/lib/ffi/inline/compilers/gxx.rb
index c817cbd..1dcdd89 100644
--- a/lib/ffi/inline/compilers/gxx.rb
+++ b/lib/ffi/inline/compilers/gxx.rb
@@ -17,7 +17,7 @@ def exists?
 
 	def input
 		File.join(Inline.directory, "#{digest}.cpp").tap {|path|
-			File.open(path, 'w') { |f| f.write(@code) } unless File.exists?(path)
+			File.open(path, 'w') { |f| f.write(@code) } unless File.exist?(path)
 		}
 	end
 
diff --git a/lib/ffi/inline/compilers/tcc.rb b/lib/ffi/inline/compilers/tcc.rb
index d443cd2..5308992 100644
--- a/lib/ffi/inline/compilers/tcc.rb
+++ b/lib/ffi/inline/compilers/tcc.rb
@@ -19,7 +19,7 @@ def compile (code, libraries = [])
     @code      = code
     @libraries = libraries
 
-    return output if File.exists?(output)
+    return output if File.exist?(output)
 
     cmd = if RbConfig::CONFIG['target_os'] =~ /mswin|mingw/
       "sh -c '#{ldshared} #{ENV['CFLAGS']} #{libs} -o #{output.shellescape} #{input.shellescape}' 2>>#{log.shellescape}"
@@ -41,7 +41,7 @@ def digest
 
   def input
     File.join(Inline.directory, "#{digest}.c").tap {|path|
-      File.open(path, 'w') { |f| f.write(@code) } unless File.exists?(path)
+      File.open(path, 'w') { |f| f.write(@code) } unless File.exist?(path)
     }
   end
 
diff --git a/lib/ffi/inline/inline.rb b/lib/ffi/inline/inline.rb
index 2f69168..24b40d6 100644
--- a/lib/ffi/inline/inline.rb
+++ b/lib/ffi/inline/inline.rb
@@ -21,11 +21,11 @@ def self.directory
 			@directory ||= File.expand_path(File.join(Dir.tmpdir, ".ffi-inline-#{Process.uid}"))
 		end
 
-		if File.exists?(@directory) && !File.directory?(@directory)
+		if File.exist?(@directory) && !File.directory?(@directory)
 			raise 'the FFI_INLINER_PATH exists and is not a directory'
 		end
 
-		if !File.exists?(@directory)
+		if !File.exist?(@directory)
 			FileUtils.mkdir(@directory)
 		end