diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 0afe589e6b3..93e9117d956 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,7 @@
+2012-04-04  Tristan Gingold  <gingold@adacore.com>
+
+	* libgfortran.h: Include complex.h before math.h
+
 2012-04-02  Tristan Gingold  <gingold@adacore.com>
 
 	* configure.ac: Use new version of GCC_CHECK_MATH_FUNC.
diff --git a/libgfortran/libgfortran.h b/libgfortran/libgfortran.h
index be5f133bb83..ea20e140c46 100644
--- a/libgfortran/libgfortran.h
+++ b/libgfortran/libgfortran.h
@@ -42,11 +42,19 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "config.h"
 
 #include <stdio.h>
-#include <math.h>
 #include <stddef.h>
 #include <float.h>
 #include <stdarg.h>
 
+#if HAVE_COMPLEX_H
+/* Must appear before math.h on VMS systems.  */
+# include <complex.h>
+#else
+#define complex __complex__
+#endif
+
+#include <math.h>
+
 /* If we're support quad-precision floating-point type, include the
    header to our support library.  */
 #ifdef HAVE_FLOAT128
@@ -66,12 +74,6 @@ extern long double __strtold (const char *, char **);
 #define gfc_strtold strtold
 #endif
 
-#if HAVE_COMPLEX_H
-# include <complex.h>
-#else
-#define complex __complex__
-#endif
-
 #include "../gcc/fortran/libgfortran.h"
 
 #include "c99_protos.h"