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-rw-r--r--src/c/elementaryFunctions/nansum/znansuma.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/c/elementaryFunctions/nansum/znansuma.c b/src/c/elementaryFunctions/nansum/znansuma.c
index cb839f02..7f679e47 100644
--- a/src/c/elementaryFunctions/nansum/znansuma.c
+++ b/src/c/elementaryFunctions/nansum/znansuma.c
@@ -15,6 +15,7 @@
#include "types.h"
#include "doubleComplex.h"
#include "addition.h"
+#include "isnan.h"
doubleComplex znansuma(doubleComplex *in, int size)
{