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-rw-r--r--src/matrix_orthogonal.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/matrix_orthogonal.c b/src/matrix_orthogonal.c
index 8acf650..54a38b8 100644
--- a/src/matrix_orthogonal.c
+++ b/src/matrix_orthogonal.c
@@ -3,6 +3,7 @@
iem_matrix written by Thomas Musil (c) IEM KUG Graz Austria 2002 - 2006 */
+#include "m_pd.h"
/* -------------------------- matrix_orthogonal ------------------------------ */