diff --git a/mozilla/nsprpub/configure b/mozilla/nsprpub/configure
index 2a6c45423f0..4da2bb9cfab 100755
--- a/mozilla/nsprpub/configure
+++ b/mozilla/nsprpub/configure
@@ -3130,7 +3130,7 @@ EOF
     fi
     DSO_LDOPTS='-dynamiclib -compatibility_version 1 -current_version 1 -all_load -install_name @executable_path/$@'
     # Use the standard preprocessor (cpp)
-    CFLAGS="$CFLAGS -traditional-cpp"
+    CFLAGS="$CFLAGS -no-cpp-precomp"
     MKSHLIB='$(CC) -arch $(CPU_ARCH) $(DSO_LDOPTS) -o $@'
     STRIP="$STRIP -x -S"
     DLL_SUFFIX=dylib
diff --git a/mozilla/nsprpub/configure.in b/mozilla/nsprpub/configure.in
index ddb625fb6a1..67edf8900c1 100644
--- a/mozilla/nsprpub/configure.in
+++ b/mozilla/nsprpub/configure.in
@@ -799,7 +799,7 @@ case "$target" in
     fi
     DSO_LDOPTS='-dynamiclib -compatibility_version 1 -current_version 1 -all_load -install_name @executable_path/$@'
     # Use the standard preprocessor (cpp)
-    CFLAGS="$CFLAGS -traditional-cpp"
+    CFLAGS="$CFLAGS -no-cpp-precomp"
     MKSHLIB='$(CC) -arch $(CPU_ARCH) $(DSO_LDOPTS) -o $@'
     STRIP="$STRIP -x -S"
     DLL_SUFFIX=dylib