diff --git a/ext/socket/basicsocket.c b/ext/socket/basicsocket.c
index 2641b4410b..a1065608e6 100644
--- a/ext/socket/basicsocket.c
+++ b/ext/socket/basicsocket.c
@@ -314,6 +314,18 @@ bsock_getsockopt(VALUE sock, VALUE lev, VALUE optname)
     level = rsock_level_arg(family, lev);
     option = rsock_optname_arg(family, level, optname);
     len = 256;
+#ifdef _AIX
+    switch (option) {
+      case SO_DEBUG:
+      case SO_REUSEADDR:
+      case SO_KEEPALIVE:
+      case SO_DONTROUTE:
+      case SO_BROADCAST:
+      case SO_OOBINLINE:
+        /* AIX doesn' set len for boolean options */
+        len = sizeof(int);
+    }
+#endif
     buf = ALLOCA_N(char,len);
 
     rb_io_check_closed(fptr);
diff --git a/version.h b/version.h
index 4154dcce55..4e0edaaf4e 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.5.4"
-#define RUBY_RELEASE_DATE "2019-03-11"
-#define RUBY_PATCHLEVEL 144
+#define RUBY_RELEASE_DATE "2019-03-12"
+#define RUBY_PATCHLEVEL 145
 
 #define RUBY_RELEASE_YEAR 2019
 #define RUBY_RELEASE_MONTH 3
-#define RUBY_RELEASE_DAY 11
+#define RUBY_RELEASE_DAY 12
 
 #include "ruby/version.h"