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-rw-r--r--src/include/cctk.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/include/cctk.h b/src/include/cctk.h
index d94b5be6..e643be92 100644
--- a/src/include/cctk.h
+++ b/src/include/cctk.h
@@ -120,6 +120,9 @@
#ifdef CCODE
+/* get the definition of ptrdiff_t */
+#include <stdlib.h>
+
#include "cGH.h"
#include "cctk_ActiveThorns.h"
@@ -229,7 +232,7 @@ static inline int CCTK_GFINDEX4D (const cGH *GH, int i, int j, int k, int l)
#define _DECLARE_CCTK_ARGUMENTS _DECLARE_CCTK_CARGUMENTS
#define _DECLARE_CCTK_CARGUMENTS \
- int cctki_dummy_int;\
+ ptrdiff_t cctki_dummy_int;\
int cctk_dim = cctkGH->cctk_dim;\
int *cctk_gsh = cctkGH->cctk_gsh;\
int *cctk_lsh = cctkGH->cctk_lsh;\