diff --git a/src/core/unit_tests/fpe.cpp b/src/core/unit_tests/fpe.cpp
index 81c8cb9653..77760b4427 100644
--- a/src/core/unit_tests/fpe.cpp
+++ b/src/core/unit_tests/fpe.cpp
@@ -269,5 +269,6 @@ puts("defined(__FAST_MATH__)");
 #else
 puts("!defined(__FAST_MATH__)");
 #endif
+return 2;
 }
 #endif