diff --git a/libasn1compiler/asn1compiler.h b/libasn1compiler/asn1compiler.h
new file mode 100644
index 0000000..d104dc9
--- /dev/null
+++ b/libasn1compiler/asn1compiler.h
@@ -0,0 +1,41 @@
+#ifndef	ASN1_COMPILER_H
+#define	ASN1_COMPILER_H
+
+#include <asn1parser.h>
+
+enum asn1c_flags {
+	A1C_NOFLAGS,
+	/*
+	 * Debug the compiler.
+	 */
+	A1C_DEBUG		= 0x0001,
+	/*
+	 * Do not split the target output in several files, just print it.
+	 * (Note: the output is not likely to be compilable in this case).
+	 */
+	A1C_PRINT_COMPILED	= 0x0002,
+	/*
+	 * Generate only the tables for ASN.1 types,
+	 * do not emit ASN.1 parsing support code.
+	 */
+	A1C_OMIT_SUPPORT_CODE	= 0x0004,
+	/*
+	 * Use native integers instead of INTEGER_t and ENUMERATED_t types.
+	 */
+	A1C_USE_NATIVE_INTEGERS	= 0x0008,
+	/*
+	 * Do not use C99 extensions.
+	 */
+	A1C_NO_C99		= 0x0010,
+	/*
+	 * Enable use of unnamed unions (non-portable feature).
+	 */
+	A1C_UNNAMED_UNIONS	= 0x0020,
+};
+
+/*
+ * Compile the ASN.1 specification.
+ */
+int asn1_compile(asn1p_t *asn, const char *datadir, enum asn1c_flags);
+
+#endif	/* ASN1_COMPILER_H */