--- src/include/openssl/base.h
+++ src/include/openssl/base.h
@@ -258,7 +258,7 @@ extern "C" {
 // with the old gnu89 model:
 // https://stackoverflow.com/questions/216510/extern-inline
 #if defined(__cplusplus)
-#define OPENSSL_INLINE inline
+#define OPENSSL_INLINE static inline
 #else
 // Add OPENSSL_UNUSED so that, should an inline function be emitted via macro
 // (e.g. a |STACK_OF(T)| implementation) in a source file without tripping