diff --git a/runtime/vm/compiler/assembler/assembler_arm64_test.cc b/runtime/vm/compiler/assembler/assembler_arm64_test.cc
index a41fad24ae0..bf690bcde54 100644
--- a/runtime/vm/compiler/assembler/assembler_arm64_test.cc
+++ b/runtime/vm/compiler/assembler/assembler_arm64_test.cc
@@ -577,7 +577,7 @@ ASSEMBLER_TEST_RUN(Semaphore32, test) {
   typedef intptr_t (*Semaphore32)() DART_UNUSED;
   // Lower word has been atomically switched from 40 to 42k, whereas upper word
   // is unchanged at 40.
-  EXPECT_EQ(42 + (40l << 32),
+  EXPECT_EQ(42 + (DART_INT64_C(40) << 32),
             EXECUTE_TEST_CODE_INT64(Semaphore32, test->entry()));
 }
 
@@ -604,7 +604,7 @@ ASSEMBLER_TEST_RUN(FailedSemaphore32, test) {
   typedef intptr_t (*FailedSemaphore32)() DART_UNUSED;
   // Lower word has had the failure code (1) added to it.  Upper word is
   // unchanged at 40.
-  EXPECT_EQ(41 + (40l << 32),
+  EXPECT_EQ(41 + (DART_INT64_C(40) << 32),
             EXECUTE_TEST_CODE_INT64(FailedSemaphore32, test->entry()));
 }