diff --git a/src/formatters/tla.ts b/src/formatters/tla.ts
index 966826b..96ad345 100644
--- a/src/formatters/tla.ts
+++ b/src/formatters/tla.ts
@@ -118,11 +118,11 @@ function testStateDefBlockStart(line: vscode.TextLine, options: vscode.Formattin
 }
 
 function testBlockStart(line: vscode.TextLine): LineInfo | undefined {
-    const matches = /^(\s*)(?:\w+\:)?\s*(?:begin|if|else|elsif|while|either|or|with|define|macro|procedure)\b.*/g.exec(line.text);
+    const matches = /^(\s*)(?:\w+\:)?\s*(?:begin\b|if\b|else\b|elsif\b|while\b|either\b|or\b|with\b|define\b|macro\b|procedure\b|\{).*/g.exec(line.text);
     return matches ? new LineInfo(line, matches[1], IndentationType.Right) : undefined;
 }
 
 function testBlockEnd(line: vscode.TextLine): LineInfo | undefined {
-    const matches = /^(\s*)(?:end|else|elsif|or)\b.*/g.exec(line.text);
+    const matches = /^(\s*)(?:end\b|else\b|elsif\b|or\b|\}).*/g.exec(line.text);
     return matches ? new LineInfo(line, matches[1], IndentationType.Left) : undefined;
 }
diff --git a/tests/suite/formatters/tla.test.ts b/tests/suite/formatters/tla.test.ts
index 803253f..87616fc 100644
--- a/tests/suite/formatters/tla.test.ts
+++ b/tests/suite/formatters/tla.test.ts
@@ -587,6 +587,32 @@ suite('TLA On Type Formatting Test Suite', () => {
         ]);
     });
 
+    test('Indents block contents, c-syntax', () => {
+        return assertTlaOnTypeFormatting(doc, [
+            '    procedure Foo() {',
+            '    ${enter}',
+            '    }'
+        ], [
+            '    procedure Foo() {',
+            '        ',
+            '    }'
+        ]);
+    });
+
+    test('Keeps correct indentation after closed block, c-syntax', () => {
+        return assertTlaOnTypeFormatting(doc, [
+            '    procedure Foo() {',
+            '        skip;',
+            '    }',
+            '    ${enter}'
+        ], [
+            '    procedure Foo() {',
+            '        skip;',
+            '    }',
+            '    '
+        ]);
+    });
+
     test('CAN IMPROVE: Indents to the body of enclosing block', () => {
         return assertTlaOnTypeFormatting(doc, [
                 '    begin',