diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5acc1e4cbc..120d03c959 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -87,6 +87,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules)
 INCLUDE(UseLemon)
 INCLUDE(UseMakeDissectorReg)
 INCLUDE(UseMakeTapReg)
+INCLUDE(UseAsn2Wrs)
 
 # Under linux the release mode (CMAKE_BUILD_TYPE=release) defines NDEBUG
 
diff --git a/asn1/HI2Operations/CMakeLists.txt b/asn1/HI2Operations/CMakeLists.txt
index aa3c34fe96..5ba086c840 100644
--- a/asn1/HI2Operations/CMakeLists.txt
+++ b/asn1/HI2Operations/CMakeLists.txt
@@ -25,15 +25,21 @@ set( PROTOCOL_NAME HI2Operations )
 
 set( ASN_FILE_LIST
 	HI2Operations_ver11.asn
-        UmtsHI2Operations.asn
-        TS101909201.asn
-        PCESP.asn
-        EN301040.asn
+	UmtsHI2Operations.asn
+	TS101909201.asn
+	PCESP.asn
+	EN301040.asn
+)
+
+set( EXTRA_DIST
+	${ASN_FILE_LIST}
+	packet-${PROTOCOL_NAME}-template.c
+	${PROTOCOL_NAME}.cnf
 )
 
 set( SRC_FILES
-        ${EXTRA_DIST}
-        ${EXT_ASN_FILE_LIST}
+	${EXTRA_DIST}
+	${EXT_ASN_FILE_LIST}
 )
 
 set( A2W_FLAGS -b )
@@ -41,41 +47,5 @@ set( A2W_FLAGS -b )
 set( EXTRA_CNF
 )
 
-set( DISSECTOR ${CMAKE_SOURCE_DIR}/epan/dissectors/packet-${PROTOCOL_NAME}.c )
-
-if ( NOT PROTO_OPT )
-	set( PROTO_OPT -p ${PROTOCOL_NAME} )
-endif()
-
-# Don't use packet-${PROTOCOL_NAME}.c instead of generate_dissector, it will
-# cause EXCLUDE_FROM_ALL to be ignored.
-ADD_CUSTOM_TARGET(generate_dissector ALL
-	COMMAND ${PYTHON_EXECUTABLE}
-	  ${CMAKE_SOURCE_DIR}/tools/asn2wrs.py
-	  ${A2W_FLAGS}
-	  ${PROTO_OPT}
-	  -c ${CMAKE_CURRENT_SOURCE_DIR}/${PROTOCOL_NAME}.cnf
-	  -s ${CMAKE_CURRENT_SOURCE_DIR}/packet-${PROTOCOL_NAME}-template
-	  -D ${CMAKE_CURRENT_SOURCE_DIR}
-	  -O ${CMAKE_SOURCE_DIR}/epan/dissectors
-	  ${EXT_ASN_FILE_LIST} ${ASN_FILE_LIST} ${EXT_ASN_FILE_LIST_LATE}
-	DEPENDS
-	  ${CMAKE_SOURCE_DIR}/tools/asn2wrs.py
-	  ${SRC_FILES}
-	  ${EXTRA_CNF}
-)
-
-ADD_CUSTOM_TARGET(generate_export ALL
-	COMMAND ${PYTHON_EXECUTABLE}
-	  ${CMAKE_SOURCE_DIR}/tools/asn2wrs.py
-	  -E
-	  ${A2W_FLAGS}
-	  ${PROTO_OPT}
-	  -c ${CMAKE_CURRENT_SOURCE_DIR}/${PROTOCOL_NAME}.cnf
-	  -D ${CMAKE_CURRENT_SOURCE_DIR}
-	  ${EXT_ASN_FILE_LIST} ${ASN_FILE_LIST} ${EXT_ASN_FILE_LIST_LATE}
-	DEPENDS
-	  ${CMAKE_SOURCE_DIR}/tools/asn2wrs.py
-	  ${SRC_FILES}
-)
+ASN2WRS()
 
diff --git a/asn1/gsm_map/CMakeLists.txt b/asn1/gsm_map/CMakeLists.txt
index 1fc4448aed..b90eb3240f 100644
--- a/asn1/gsm_map/CMakeLists.txt
+++ b/asn1/gsm_map/CMakeLists.txt
@@ -21,3 +21,81 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 #
 
+set( PROTOCOL_NAME gsm_map )
+
+set( PROTO_OPT _EMPTY_ )
+
+#EXPORT_FILES = \
+#	$(PROTOCOL_NAME)-exp.cnf
+
+set( EXT_ASN_FILE_LIST
+	../ros/Remote-Operations-Information-Objects.asn
+)
+
+set( DATATYPES_ASN_FILES
+	MAP-ExtensionDataTypes.asn
+	MAP-CommonDataTypes.asn
+	MAP-SS-DataTypes.asn
+	MAP-ER-DataTypes.asn
+	MAP-SM-DataTypes.asn
+	MAP-OM-DataTypes.asn
+	MAP-MS-DataTypes.asn
+	MAP-CH-DataTypes.asn
+	MAP-LCS-DataTypes.asn
+	MAP-GR-DataTypes.asn
+)
+
+set( OPERATIONS_ASN_FILES
+	MAP-LocationServiceOperations.asn
+	MAP-Group-Call-Operations.asn
+	MAP-ShortMessageServiceOperations.asn
+	MAP-SupplementaryServiceOperations.asn
+	MAP-CallHandlingOperations.asn
+	MAP-OperationAndMaintenanceOperations.asn
+	MAP-MobileServiceOperations.asn
+)
+
+set( SS_ASN_FILES
+	SS-DataTypes.asn
+	SS-Operations.asn
+)
+
+set( PROPRIETARY_ASN_FILES
+	Ericsson.asn
+)
+
+set( ASN_FILE_LIST
+	MobileDomainDefinitions.asn
+	MAP-ApplicationContexts.asn
+	MAP-SS-Code.asn
+	MAP-BS-Code.asn
+	MAP-TS-Code.asn
+	${DATATYPES_ASN_FILES}
+	MAP-DialogueInformation.asn
+	${OPERATIONS_ASN_FILES}
+	MAP-Errors.asn
+	MAP-Protocol.asn
+	GSMMAP.asn
+	${SS_ASN_FILES}
+	${PROPRIETARY_ASN_FILES}
+)
+
+set( EXTRA_DIST
+	${ASN_FILE_LIST}
+	packet-${PROTOCOL_NAME}-template.c
+	packet-${PROTOCOL_NAME}-template.h
+	${PROTOCOL_NAME}.cnf
+)
+
+set( SRC_FILES
+	${EXTRA_DIST}
+	${EXT_ASN_FILE_LIST}
+)
+
+set( A2W_FLAGS -b )
+
+set( EXTRA_CNF
+)
+
+ASN2WRS()
+
diff --git a/cmake/modules/UseAsn2Wrs.cmake b/cmake/modules/UseAsn2Wrs.cmake
new file mode 100644
index 0000000000..72c4096d07
--- /dev/null
+++ b/cmake/modules/UseAsn2Wrs.cmake
@@ -0,0 +1,44 @@
+#
+# $Id$
+#
+MACRO(ASN2WRS)
+	set( DISSECTOR ${CMAKE_SOURCE_DIR}/epan/dissectors/packet-${PROTOCOL_NAME}.c )
+
+	if ( NOT PROTO_OPT )
+		set( PROTO_OPT -p ${PROTOCOL_NAME} )
+	elseif ( PROTO_OPT STREQUAL "_EMPTY_" )
+		set( PROTO_OPT )
+	endif()
+
+	# Don't use packet-${PROTOCOL_NAME}.c instead of generate_dissector, it will
+	# cause EXCLUDE_FROM_ALL to be ignored.
+	ADD_CUSTOM_TARGET(generate_dissector-${PROTOCOL_NAME} ALL
+		COMMAND ${PYTHON_EXECUTABLE}
+		  ${CMAKE_SOURCE_DIR}/tools/asn2wrs.py
+		  ${A2W_FLAGS}
+		  ${PROTO_OPT}
+		  -c ${CMAKE_CURRENT_SOURCE_DIR}/${PROTOCOL_NAME}.cnf
+		  -s ${CMAKE_CURRENT_SOURCE_DIR}/packet-${PROTOCOL_NAME}-template
+		  -D ${CMAKE_CURRENT_SOURCE_DIR}
+		  -O ${CMAKE_SOURCE_DIR}/epan/dissectors
+		  ${EXT_ASN_FILE_LIST} ${ASN_FILE_LIST} ${EXT_ASN_FILE_LIST_LATE}
+		DEPENDS
+		  ${CMAKE_SOURCE_DIR}/tools/asn2wrs.py
+		  ${SRC_FILES}
+		  ${EXTRA_CNF}
+	)
+
+	ADD_CUSTOM_TARGET(generate_export-${PROTOCOL_NAME} ALL
+		COMMAND ${PYTHON_EXECUTABLE}
+		  ${CMAKE_SOURCE_DIR}/tools/asn2wrs.py
+		  -E
+		  ${A2W_FLAGS}
+		  ${PROTO_OPT}
+		  -c ${CMAKE_CURRENT_SOURCE_DIR}/${PROTOCOL_NAME}.cnf
+		  -D ${CMAKE_CURRENT_SOURCE_DIR}
+		  ${EXT_ASN_FILE_LIST} ${ASN_FILE_LIST} ${EXT_ASN_FILE_LIST_LATE}
+		DEPENDS
+		  ${CMAKE_SOURCE_DIR}/tools/asn2wrs.py
+		  ${SRC_FILES}
+	)
+ENDMACRO()