5 files changed, 15 insertions, 10 deletions
diff --git a/include/libdecnumber/decContext.h b/include/libdecnumber/decContext.h
index 01365e2313..cea6e4279e 100644
--- a/include/libdecnumber/decContext.h
+++ b/include/libdecnumber/decContext.h
@@ -50,8 +50,9 @@
 /*								      */
 /* ------------------------------------------------------------------ */
 
-#if !defined(DECCONTEXT)
-  #define DECCONTEXT
+#ifndef DECCONTEXT_H
+#define DECCONTEXT_H
+
   #define DECCNAME     "decContext"			/* Short name */
   #define DECCFULLNAME "Decimal Context Descriptor"   /* Verbose name */
   #define DECCAUTHOR   "Mike Cowlishaw"		      /* Who to blame */
diff --git a/include/libdecnumber/decNumber.h b/include/libdecnumber/decNumber.h
index 3f3a74af9e..aa115fed07 100644
--- a/include/libdecnumber/decNumber.h
+++ b/include/libdecnumber/decNumber.h
@@ -32,8 +32,9 @@
 /* Decimal Number arithmetic module header			      */
 /* ------------------------------------------------------------------ */
 
-#if !defined(DECNUMBER)
-  #define DECNUMBER
+#ifndef DECNUMBER_H
+#define DECNUMBER_H
+
   #define DECNAME     "decNumber"			/* Short name */
   #define DECFULLNAME "Decimal Number Module"	      /* Verbose name */
   #define DECAUTHOR   "Mike Cowlishaw"		      /* Who to blame */
diff --git a/include/libdecnumber/dpd/decimal128.h b/include/libdecnumber/dpd/decimal128.h
index 13d1ae81f8..aff261e556 100644
--- a/include/libdecnumber/dpd/decimal128.h
+++ b/include/libdecnumber/dpd/decimal128.h
@@ -32,8 +32,9 @@
 /* Decimal 128-bit format module header				      */
 /* ------------------------------------------------------------------ */
 
-#if !defined(DECIMAL128)
-  #define DECIMAL128
+#ifndef DECIMAL128_H
+#define DECIMAL128_H
+
   #define DEC128NAME	 "decimal128"		      /* Short name   */
   #define DEC128FULLNAME "Decimal 128-bit Number"     /* Verbose name */
   #define DEC128AUTHOR	 "Mike Cowlishaw"	      /* Who to blame */
diff --git a/include/libdecnumber/dpd/decimal32.h b/include/libdecnumber/dpd/decimal32.h
index 03c80dbbaa..6cb9e43620 100644
--- a/include/libdecnumber/dpd/decimal32.h
+++ b/include/libdecnumber/dpd/decimal32.h
@@ -32,8 +32,9 @@
 /* Decimal 32-bit format module header				      */
 /* ------------------------------------------------------------------ */
 
-#if !defined(DECIMAL32)
-  #define DECIMAL32
+#ifndef DECIMAL32_H
+#define DECIMAL32_H
+
   #define DEC32NAME	"decimal32"		      /* Short name   */
   #define DEC32FULLNAME "Decimal 32-bit Number"	      /* Verbose name */
   #define DEC32AUTHOR	"Mike Cowlishaw"	      /* Who to blame */
diff --git a/include/libdecnumber/dpd/decimal64.h b/include/libdecnumber/dpd/decimal64.h
index a375faf4d2..f29e57064d 100644
--- a/include/libdecnumber/dpd/decimal64.h
+++ b/include/libdecnumber/dpd/decimal64.h
@@ -32,8 +32,9 @@
 /* Decimal 64-bit format module header				      */
 /* ------------------------------------------------------------------ */
 
-#if !defined(DECIMAL64)
-  #define DECIMAL64
+#ifndef DECIMAL64_H
+#define DECIMAL64_H
+
   #define DEC64NAME	"decimal64"		      /* Short name   */
   #define DEC64FULLNAME "Decimal 64-bit Number"	      /* Verbose name */
   #define DEC64AUTHOR	"Mike Cowlishaw"	      /* Who to blame */