diff --git a/src/feedback/EAGLE/imf.h b/src/feedback/EAGLE/imf.h
index 5510c95ca197170c01b24fbe10539d1c7010541f..767b2c312bfc0a5041da0c6be1db9e356bc829ad 100644
--- a/src/feedback/EAGLE/imf.h
+++ b/src/feedback/EAGLE/imf.h
@@ -23,6 +23,7 @@
 #include <string.h>
 
 /* Local includes. */
+#include "exp10.h"
 #include "inline.h"
 #include "interpolate.h"
 #include "minmax.h"