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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 98459d4..a749794 100644
--- a/configure.ac
+++ b/configure.ac
@@ -48,7 +48,7 @@ AC_ARG_WITH(kernel-headers,
esac],
[KERNEL_HEADERS_DIR="/usr/src/kernel-headers"])
-CPPFLAGS="-I$KERNEL_HEADERS_DIR/include"
+CPPFLAGS="$CPPFLAGS -I$KERNEL_HEADERS_DIR/include"
# Checks for header files.
AC_CHECK_HEADERS([linux/media.h \