diff --git a/src/extlib/ib_util.h b/src/extlib/ib_util.h
index d0bc1828ed..f70eab2a6a 100644
--- a/src/extlib/ib_util.h
+++ b/src/extlib/ib_util.h
@@ -21,17 +21,17 @@
  * Contributor(s): ______________________________________.
  */
 
-#ifndef _IB_UTIL_H
-#define _IB_UTIL_H
+#ifndef FIREBIRD_IB_UTIL_H
+#define FIREBIRD_IB_UTIL_H
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-extern void *ib_util_malloc(long);
+extern void* ib_util_malloc(long);
 
 #ifdef __cplusplus
 }	/* extern "C" */
 #endif
 
-#endif /* _IB_UTIL_H */
+#endif /* FIREBIRD_IB_UTIL_H */
diff --git a/src/yvalve/perf.h b/src/yvalve/perf.h
index 6f9685094d..b3d9958a15 100644
--- a/src/yvalve/perf.h
+++ b/src/yvalve/perf.h
@@ -28,8 +28,8 @@
  *
  */
 
-#ifndef JRD_PERF_H
-#define JRD_PERF_H
+#ifndef FIREBIRD_PERF_H
+#define FIREBIRD_PERF_H
 
 #include <stdio.h>
 
@@ -116,5 +116,5 @@ typedef struct perf64
 
 #include "../yvalve/perf_proto.h"
 
-#endif /* JRD_PERF_H */
+#endif /* FIREBIRD_PERF_H */