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-rw-r--r--ext/bigdecimal/missing.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/ext/bigdecimal/missing.h b/ext/bigdecimal/missing.h
index 307147c0fd..325554b5f5 100644
--- a/ext/bigdecimal/missing.h
+++ b/ext/bigdecimal/missing.h
@@ -35,10 +35,10 @@ extern "C" {
#endif /* RB_UNUSED_VAR */
#if defined(_MSC_VER) && _MSC_VER >= 1310
-# define HAVE___ASSUME
+# define HAVE___ASSUME 1
#elif defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 1300
-# define HAVE___ASSUME
+# define HAVE___ASSUME 1
#endif
#ifndef UNREACHABLE