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-rw-r--r--src/proj_internal.h6
1 files changed, 0 insertions, 6 deletions
diff --git a/src/proj_internal.h b/src/proj_internal.h
index 1aca9201..30a4a89e 100644
--- a/src/proj_internal.h
+++ b/src/proj_internal.h
@@ -118,12 +118,6 @@ void proj_fileapi_set (PJ *P, void *fileapi);
const char * const *proj_get_searchpath(void);
int proj_get_path_count(void);
-#if HAVE_C99_MATH
-#define pj_is_nan isnan
-#else
-int pj_is_nan (double val);
-#endif
-
#ifdef __cplusplus
}
#endif