diff --git a/pkg/system/meminfo_solaris.go b/pkg/system/meminfo_solaris.go
index 7f4f84f73a..925776e789 100644
--- a/pkg/system/meminfo_solaris.go
+++ b/pkg/system/meminfo_solaris.go
@@ -7,6 +7,7 @@ import (
 	"unsafe"
 )
 
+// #cgo CFLAGS: -std=c99
 // #cgo LDFLAGS: -lkstat
 // #include <unistd.h>
 // #include <stdlib.h>