Index: lib/Format/TokenAnnotator.cpp
===================================================================
--- lib/Format/TokenAnnotator.cpp
+++ lib/Format/TokenAnnotator.cpp
@@ -589,6 +589,14 @@
         CurrentToken->Type = TT_ImplicitStringLiteral;
         next();
       }
+    } else if (CurrentToken && CurrentToken->TokenText == "option") {
+      next(); // Consume "option".
+      while (CurrentToken) {
+        // Don't add space after binary operator.
+        if (CurrentToken->Previous->Type == TT_BinaryOperator)
+          CurrentToken->Type = TT_ImplicitStringLiteral;
+        next();
+      }
     }
   }
 
Index: unittests/Format/FormatTest.cpp
===================================================================
--- unittests/Format/FormatTest.cpp
+++ unittests/Format/FormatTest.cpp
@@ -8795,6 +8795,12 @@
                    "(including parentheses)."));
 }
 
+TEST_F(FormatTest, UnderstandPragmaOption) {
+  verifyFormat("#pragma option -C -A");
+
+  EXPECT_EQ("#pragma option -C -A", format("#pragma    option   -C   -A"));
+}
+
 #define EXPECT_ALL_STYLES_EQUAL(Styles)                                        \
   for (size_t i = 1; i < Styles.size(); ++i)                                   \
     EXPECT_EQ(Styles[0], Styles[i]) << "Style #" << i << " of "                \