diff --git a/tests/math_test.cpp b/tests/math_test.cpp
index 72276d8..f816fad 100644
--- a/tests/math_test.cpp
+++ b/tests/math_test.cpp
@@ -1005,7 +1005,7 @@
 }
 
 TEST(MATH_TEST, erfcl) {
-  ASSERT_DOUBLE_EQ(0.15729920705028513l, erfcl(1.0L));
+  ASSERT_DOUBLE_EQ(0.15729920705028513L, erfcl(1.0L));
 }
 
 TEST(MATH_TEST, lrint) {