diff --git a/compiler-rt/lib/scudo/standalone/secondary.h b/compiler-rt/lib/scudo/standalone/secondary.h
--- a/compiler-rt/lib/scudo/standalone/secondary.h
+++ b/compiler-rt/lib/scudo/standalone/secondary.h
@@ -64,7 +64,7 @@
 
 } // namespace LargeBlock
 
-static void unmap(LargeBlock::Header *H) {
+static inline void unmap(LargeBlock::Header *H) {
   // Note that the `H->MapMap` is stored on the pages managed by itself. Take
   // over the ownership before unmap() so that any operation along with unmap()
   // won't touch inaccessible pages.