1 files changed, 4 insertions, 2 deletions
diff --git a/src/PJ_wag7.c b/src/PJ_wag7.c
index a820b2cd..3cd332ad 100644
--- a/src/PJ_wag7.c
+++ b/src/PJ_wag7.c
@@ -1,5 +1,8 @@
 #define PJ_LIB__
-#include	"projects.h"
+
+#include <math.h>
+
+#include "projects.h"
 
 PROJ_HEAD(wag7, "Wagner VII") "\n\tMisc Sph, no inv.";
 
@@ -25,4 +28,3 @@ PJ *PROJECTION(wag7) {
     P->es = 0.;
     return P;
 }
-