diff --git a/ChangeLog b/ChangeLog
index 0e5475ca12..60c04427d0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2016-03-03  H.J. Lu  <hongjiu.lu@intel.com>
+
+	[BZ #19758]
+	* sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
+	(EXTRA_LD_ENVVARS): Or bit_Prefer_MAP_32BIT_EXEC.
+
 2016-03-03  Paul Pluzhnikov  <ppluzhnikov@google.com>
 
 	[BZ #19490]
diff --git a/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h b/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
index c9db5ea777..a759934fdd 100644
--- a/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
+++ b/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
@@ -33,7 +33,7 @@
   case 21:							      \
     if (memcmp (envline, "PREFER_MAP_32BIT_EXEC", 21) == 0)	      \
       GLRO(dl_x86_cpu_features).feature[index_Prefer_MAP_32BIT_EXEC]  \
-	= bit_Prefer_MAP_32BIT_EXEC;				      \
+	|= bit_Prefer_MAP_32BIT_EXEC;				      \
     break;
 
 /* Extra unsecure variables.  The names are all stuffed in a single