diff --git a/compiler-rt/lib/msan/msan_interceptors.cpp b/compiler-rt/lib/msan/msan_interceptors.cpp
--- a/compiler-rt/lib/msan/msan_interceptors.cpp
+++ b/compiler-rt/lib/msan/msan_interceptors.cpp
@@ -1767,7 +1767,7 @@
   INTERCEPT_STRTO(wcstoul);
   INTERCEPT_STRTO(wcstoll);
   INTERCEPT_STRTO(wcstoull);
-#ifdef SANITIZER_GLIBC
+#if SANITIZER_GLIBC
   INTERCEPT_STRTO(__isoc23_strtod);
   INTERCEPT_STRTO(__isoc23_strtof);
   INTERCEPT_STRTO(__isoc23_strtold);