diff --git a/clang/lib/Format/UnwrappedLineFormatter.cpp b/clang/lib/Format/UnwrappedLineFormatter.cpp
--- a/clang/lib/Format/UnwrappedLineFormatter.cpp
+++ b/clang/lib/Format/UnwrappedLineFormatter.cpp
@@ -676,7 +676,7 @@
         // { <-- current Line
         //   baz();
         // }
-        if (Line.First == Line.Last &&
+        if (Line.First == Line.Last && Line.First->isNot(TT_FunctionLBrace) &&
             Style.BraceWrapping.AfterControlStatement ==
                 FormatStyle::BWACS_MultiLine)
           return 0;
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -2860,6 +2860,19 @@
             "  baz();\n"
             "}",
             format("try{foo();}catch(...){baz();}", Style));
+
+  Style.BraceWrapping.AfterFunction = true;
+  Style.BraceWrapping.AfterControlStatement = FormatStyle::BWACS_MultiLine;
+  Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_All;
+  Style.ColumnLimit = 80;
+  verifyFormat("void shortfunction() { bar(); }", Style);
+
+  Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_None;
+  verifyFormat("void shortfunction()\n"
+               "{\n"
+               "  bar();\n"
+               "}",
+               Style);
 }
 
 TEST_F(FormatTest, BeforeWhile) {