diff --git a/src/imaevm.h b/src/imaevm.h
index 30e9730..3f1db97 100644
--- a/src/imaevm.h
+++ b/src/imaevm.h
@@ -46,7 +46,7 @@
 #include <syslog.h>
 #include <stdbool.h>
 #include <errno.h>
-
+#include <sys/types.h>
 #include <openssl/rsa.h>
 
 #ifdef USE_FPRINTF