diff --git a/configure.ac b/configure.ac
index b3cb13a9..7c8f6322 100644
--- a/configure.ac
+++ b/configure.ac
@@ -308,6 +308,7 @@ AS_CASE([$host_os],
 
 AX_CHECK_COMPILE_FLAG([$CFLAGS -Wall], [CWFLAGS="$CFLAGS -Wall"])
 AX_CHECK_COMPILE_FLAG([$CFLAGS -Wno-deprecated-declarations], [CFLAGS="$CFLAGS -Wno-deprecated-declarations"])
+AX_CHECK_COMPILE_FLAG([$CFLAGS -Wno-unknown-pragmas], [CFLAGS="$CFLAGS -Wno-unknown-pragmas"])
 
 AC_ARG_VAR([CWFLAGS], [compilation flags for generating extra warnings])