1 files changed, 1 insertions, 1 deletions
diff --git a/src/tsfn.cpp b/src/tsfn.cpp
index fb299dc9..32da09f2 100644
--- a/src/tsfn.cpp
+++ b/src/tsfn.cpp
@@ -1,7 +1,7 @@
 /* determine small t */
 #include <math.h>
 #include "proj.h"
-#include "projects.h"
+#include "proj_internal.h"
 
 double pj_tsfn(double phi, double sinphi, double e) {
     double denominator;