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-rw-r--r--lib/floor.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/floor.c b/lib/floor.c
index 12d0194bd..ada6e82a5 100644
--- a/lib/floor.c
+++ b/lib/floor.c
@@ -16,7 +16,9 @@
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
-#include <config.h>
+#if ! defined USE_LONG_DOUBLE
+# include <config.h>
+#endif
/* Specification. */
#include <math.h>