diff --git a/auto/cc b/auto/cc
index 5323f7d..2e124ec 100644
--- a/auto/cc
+++ b/auto/cc
@@ -95,7 +95,7 @@ case $NJS_CC_NAME in
         NJS_CFLAGS="$NJS_CFLAGS -Wmissing-prototypes"
 
         # Stop on warning.
-        NJS_CFLAGS="$NJS_CFLAGS -Werror"
+        NJS_CFLAGS="$NJS_CFLAGS"
 
         # Debug.
         NJS_CFLAGS="$NJS_CFLAGS -g"
@@ -131,7 +131,7 @@ case $NJS_CC_NAME in
         NJS_CFLAGS="$NJS_CFLAGS -Wmissing-prototypes"
 
         # Stop on warning.
-        NJS_CFLAGS="$NJS_CFLAGS -Werror"
+        NJS_CFLAGS="$NJS_CFLAGS"
 
         # Debug.