diff --git a/src/rec/longinRecord.c b/src/rec/longinRecord.c
index 12da09c60..611bedb34 100644
--- a/src/rec/longinRecord.c
+++ b/src/rec/longinRecord.c
@@ -21,6 +21,7 @@
 
 #include "dbDefs.h"
 #include "epicsPrint.h"
+#include "epicsMath.h"
 #include "alarm.h"
 #include "dbAccess.h"
 #include "dbEvent.h"
diff --git a/src/rec/longoutRecord.c b/src/rec/longoutRecord.c
index c6ba45a4c..0a83f7732 100644
--- a/src/rec/longoutRecord.c
+++ b/src/rec/longoutRecord.c
@@ -19,6 +19,7 @@
 
 #include "dbDefs.h"
 #include "epicsPrint.h"
+#include "epicsMath.h"
 #include "alarm.h"
 #include "dbAccess.h"
 #include "dbEvent.h"