diff --git a/gcc/common.opt b/gcc/common.opt
index a75b44ee47e..2d33861ad1f 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -3175,7 +3175,7 @@ Common Driver JoinedOrMissing Negative(gdwarf-)
 Generate debug information in default version of DWARF format.
 
 gdwarf-
-Common Driver Joined UInteger Var(dwarf_version) Init(5) Negative(gstabs)
+Common Driver Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
 Generate debug information in DWARF v2 (or later) format.
 
 gdwarf32
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 4a87b9ef8e8..4f1adcfe621 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -9638,9 +9638,8 @@ possible.
 @opindex gdwarf
 Produce debugging information in DWARF format (if that is supported).
 The value of @var{version} may be either 2, 3, 4 or 5; the default
-version for most targets is 5 (with the exception of VxWorks, TPF and
-Darwin/Mac OS X, which default to version 2, and AIX, which defaults
-to version 4).
+version for most targets is 4 (with the exception of VxWorks, TPF and
+Darwin/Mac OS X, which default to version 2).
 
 Note that with DWARF Version 2, some ports require and always
 use some non-conflicting DWARF 3 extensions in the unwind tables.