1 files changed, 1 insertions, 1 deletions
diff --git a/src/os.cc b/src/os.cc
index a07e7824..68500245 100644
--- a/src/os.cc
+++ b/src/os.cc
@@ -315,7 +315,7 @@ long getpagesize() {
 #  endif
 }
 
-void ostream::grow(size_t) {
+FMT_API void ostream::grow(size_t) {
   if (this->size() == this->capacity()) flush();
 }
 #endif  // FMT_USE_FCNTL