diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index a18be1b420..993d9a696e 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -16,6 +16,19 @@
    The license applies to all entries newer than 2009-04-28.
 */
 
+2011-04-20 13:13 UTC+0200 Viktor Szakats (harbour.01 syenar.hu)
+  * contrib/hbmxml/hbmxml.hbp
+  * contrib/hbmxml/3rd/minixml/mxml.hbp
+  * contrib/hbmzip/3rd/minizip/minizip.hbp
+  * contrib/gtalleg/gtalleg.hbm
+  * contrib/hbbz2/3rd/bz2/bz2.hbp
+  * contrib/rddads/rddads.hbp
+  * contrib/hbfimage/hbfimage.hbp
+  * contrib/hbpre.hbm
+  * contrib/hbssl/hbssl.hbm
+    ! -std=c90 -> -std=c89, -std=gnu90 -> -std=gnu89
+      Some gcc builds have problem with c90.
+
 2011-04-20 12:46 UTC+0200 Viktor Szakats (harbour.01 syenar.hu)
   * utils/hbmk2/hbmk2.prg
     ! Fixed compiled resources not triggering rebuild of
diff --git a/harbour/contrib/gtalleg/gtalleg.hbm b/harbour/contrib/gtalleg/gtalleg.hbm
index 957d1fa62e..807f4803ee 100644
--- a/harbour/contrib/gtalleg/gtalleg.hbm
+++ b/harbour/contrib/gtalleg/gtalleg.hbm
@@ -22,7 +22,7 @@
 -iflag={bcc}-a
 
 # For allegro headers
--cflag=-std=gnu90{!lngcpp&allgcc}
+-cflag=-std=gnu89{!lngcpp&allgcc}
 
 gtalleg.c
 ssf.c
diff --git a/harbour/contrib/hbbz2/3rd/bz2/bz2.hbp b/harbour/contrib/hbbz2/3rd/bz2/bz2.hbp
index dba410e67c..5f3f49dc4e 100644
--- a/harbour/contrib/hbbz2/3rd/bz2/bz2.hbp
+++ b/harbour/contrib/hbbz2/3rd/bz2/bz2.hbp
@@ -27,7 +27,7 @@ randtabl.c
 
 -cflag=-DBZ_STRICT_ANSI
 # For fileno()
--cflag=-std=gnu90{!lngcpp&allgcc}
+-cflag=-std=gnu89{!lngcpp&allgcc}
 
 # ORIGIN http://www.bzip.org/
 # VER    1.0.6
diff --git a/harbour/contrib/hbfimage/hbfimage.hbp b/harbour/contrib/hbfimage/hbfimage.hbp
index fe9d268888..7ca63d299c 100644
--- a/harbour/contrib/hbfimage/hbfimage.hbp
+++ b/harbour/contrib/hbfimage/hbfimage.hbp
@@ -24,7 +24,7 @@
 -instfile=inc:hbfimage.hbx
 
 # For FreeImage headers
--cflag=-std=gnu90{!lngcpp&allgcc}
+-cflag=-std=gnu89{!lngcpp&allgcc}
 
 hbfimage.hbx
 
diff --git a/harbour/contrib/hbmxml/3rd/minixml/mxml.hbp b/harbour/contrib/hbmxml/3rd/minixml/mxml.hbp
index 8f288bd980..45d42858b7 100644
--- a/harbour/contrib/hbmxml/3rd/minixml/mxml.hbp
+++ b/harbour/contrib/hbmxml/3rd/minixml/mxml.hbp
@@ -17,7 +17,7 @@
 {win|dos|os2}-cflag=-D_EOL_CRLF
 
 # For strdup()
--cflag=-std=gnu90{!lngcpp&allgcc}
+-cflag=-std=gnu89{!lngcpp&allgcc}
 
 mxml_att.c
 mxml_ent.c
diff --git a/harbour/contrib/hbmxml/hbmxml.hbp b/harbour/contrib/hbmxml/hbmxml.hbp
index c3b6f68706..317a6ed9b3 100644
--- a/harbour/contrib/hbmxml/hbmxml.hbp
+++ b/harbour/contrib/hbmxml/hbmxml.hbp
@@ -20,7 +20,7 @@
 -instfile=inc:hbmxml.hbx
 
 # For strdup()
--cflag=-std=gnu90{!lngcpp&allgcc}
+-cflag=-std=gnu89{!lngcpp&allgcc}
 
 hbmxml.hbx
 
diff --git a/harbour/contrib/hbmzip/3rd/minizip/minizip.hbp b/harbour/contrib/hbmzip/3rd/minizip/minizip.hbp
index 8c8bf66059..ab32dd7ab9 100644
--- a/harbour/contrib/hbmzip/3rd/minizip/minizip.hbp
+++ b/harbour/contrib/hbmzip/3rd/minizip/minizip.hbp
@@ -14,7 +14,7 @@
 -pic
 
 # for f*64() functions
--cflag=-std=gnu90{!lngcpp&allgcc}
+-cflag=-std=gnu89{!lngcpp&allgcc}
 
 ioapi.c
 zip.c
diff --git a/harbour/contrib/hbpre.hbm b/harbour/contrib/hbpre.hbm
index 94b737e0c6..1c925d817b 100644
--- a/harbour/contrib/hbpre.hbm
+++ b/harbour/contrib/hbpre.hbm
@@ -17,6 +17,6 @@
 
 {_HB_BUILD_LIBDYN}-hbdyn
 
--cflag=-std=c90{!lngcpp&allgcc}
+-cflag=-std=c89{!lngcpp&allgcc}
 
 -warn=yes
diff --git a/harbour/contrib/hbssl/hbssl.hbm b/harbour/contrib/hbssl/hbssl.hbm
index 6c1293cb2a..5843bf1807 100644
--- a/harbour/contrib/hbssl/hbssl.hbm
+++ b/harbour/contrib/hbssl/hbssl.hbm
@@ -32,7 +32,7 @@
 -cflag=-DOPENSSL_NO_IDEA
 
 # For _fileno() in openssl/applink.c
--cflag=-std=gnu90{!lngcpp&allgcc}
+-cflag=-std=gnu89{!lngcpp&allgcc}
 
 -instfile=inc:hbssl.ch
 -instfile=inc:hbssl.hbx
diff --git a/harbour/contrib/rddads/rddads.hbp b/harbour/contrib/rddads/rddads.hbp
index 2df3c3fedf..d00e02c9f9 100644
--- a/harbour/contrib/rddads/rddads.hbp
+++ b/harbour/contrib/rddads/rddads.hbp
@@ -28,7 +28,7 @@
 -cflag=-Wno-pragmas{allmingw}
 
 # for ADS headers
--cflag=-std=gnu90{!lngcpp&allgcc}
+-cflag=-std=gnu89{!lngcpp&allgcc}
 
 rddads.hbx