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-rw-r--r--Carpet/LoopControl/src/lc_auto.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/Carpet/LoopControl/src/lc_auto.c b/Carpet/LoopControl/src/lc_auto.c
index 96c6b39d7..fcfecc47b 100644
--- a/Carpet/LoopControl/src/lc_auto.c
+++ b/Carpet/LoopControl/src/lc_auto.c
@@ -6,6 +6,10 @@
#include <cctk.h>
#include <cctk_Parameters.h>
+#ifdef HAVE_TGMATH_H
+# include <tgmath.h>
+#endif
+
#include "lc_siman.h"
#include "lc_auto.h"