diff --git a/src/Type/ArrayType.php b/src/Type/ArrayType.php
index 72d21e2c3e..ce5a953a2e 100644
--- a/src/Type/ArrayType.php
+++ b/src/Type/ArrayType.php
@@ -322,24 +322,30 @@ public function setOffsetValueType(?Type $offsetType, Type $valueType, bool $uni
 			$offsetType = $offsetType->toArrayKey();
 		}
 
-		if (
-			($offsetType instanceof ConstantStringType || $offsetType instanceof ConstantIntegerType)
-			&& $offsetType->isSuperTypeOf($this->keyType)->yes()
-		) {
-			$builder = ConstantArrayTypeBuilder::createEmpty();
-			$builder->setOffsetValueType($offsetType, $valueType);
-			return $builder->getArray();
-		}
+		if ($offsetType instanceof ConstantStringType || $offsetType instanceof ConstantIntegerType) {
+			if ($offsetType->isSuperTypeOf($this->keyType)->yes()) {
+				$builder = ConstantArrayTypeBuilder::createEmpty();
+				$builder->setOffsetValueType($offsetType, $valueType);
+				return $builder->getArray();
+			}
 
-		$array = new self(
-			TypeCombinator::union($this->keyType, $offsetType),
-			$unionValues ? TypeCombinator::union($this->itemType, $valueType) : $valueType,
-		);
-		if ($offsetType instanceof ConstantIntegerType || $offsetType instanceof ConstantStringType) {
-			return TypeCombinator::intersect($array, new HasOffsetValueType($offsetType, $valueType), new NonEmptyArrayType());
+			return TypeCombinator::intersect(
+				new self(
+					TypeCombinator::union($this->keyType, $offsetType),
+					TypeCombinator::union($this->itemType, $valueType),
+				),
+				new HasOffsetValueType($offsetType, $valueType),
+				new NonEmptyArrayType(),
+			);
 		}
 
-		return TypeCombinator::intersect($array, new NonEmptyArrayType());
+		return TypeCombinator::intersect(
+			new self(
+				TypeCombinator::union($this->keyType, $offsetType),
+				$unionValues ? TypeCombinator::union($this->itemType, $valueType) : $valueType,
+			),
+			new NonEmptyArrayType(),
+		);
 	}
 
 	public function unsetOffset(Type $offsetType): Type
diff --git a/tests/PHPStan/Analyser/NodeScopeResolverTest.php b/tests/PHPStan/Analyser/NodeScopeResolverTest.php
index 1c49aef0e7..dab3ba5e3a 100644
--- a/tests/PHPStan/Analyser/NodeScopeResolverTest.php
+++ b/tests/PHPStan/Analyser/NodeScopeResolverTest.php
@@ -1084,6 +1084,7 @@ public function dataFileAsserts(): iterable
 		yield from $this->gatherAssertTypes(__DIR__ . '/../Rules/Methods/data/bug-8174.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/../Rules/Comparison/data/bug-8169.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-7519.php');
+		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-8087.php');
 	}
 
 	/**
diff --git a/tests/PHPStan/Analyser/data/bug-8087.php b/tests/PHPStan/Analyser/data/bug-8087.php
new file mode 100644
index 0000000000..1dc74349ea
--- /dev/null
+++ b/tests/PHPStan/Analyser/data/bug-8087.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Bug8087;
+
+use function PHPStan\Testing\assertType;
+
+class HelloWorld
+{
+	/**
+	 * @param array<string, mixed> $data
+	 **/
+	public function sayHello(array $data): bool
+	{
+		\PHPStan\dumpType($data);
+		assertType('array<string, mixed>', $data);
+
+		$data['uses']   = [''];
+
+		assertType("non-empty-array<string, mixed>&hasOffsetValue('uses', array{''})", $data);
+
+		$data['uses'][] = '';
+
+		assertType("non-empty-array<string, mixed>&hasOffsetValue('uses', array{'', ''})", $data);
+
+		return count($data['foo']) > 0;
+	}
+}