diff --git a/python/obitools3/obidms/capidms.pyd b/python/obitools3/obidms/capidms.pyd
index f3ae937..eee5219 100644
--- a/python/obitools3/obidms/capidms.pyd
+++ b/python/obitools3/obidms/capidms.pyd
@@ -5,11 +5,15 @@ cdef extern from *:
 cdef extern from "obidms.h":
 	struct OBIDMS_t:
         pass
-    ctypedef OBIDMS_t* OBIDMS_p 
+    
+	ctypedef OBIDMS_t* OBIDMS_p 
+
 	OBIDMS_p obi_create_dms(const_char_p name)
+	
 	OBIDMS_p obi_open_dms(const_char_p name)
+	
 	int obi_close_dms(OBIDMS_p dms)
 	
-class OBIDMS:
+cdef class OBIDMS:
 	cdef OBIDMS_p pointer
 	
\ No newline at end of file
diff --git a/python/obitools3/obidms/capidms.pyx b/python/obitools3/obidms/capidms.pyx
index 7f9f47b..e96b365 100644
--- a/python/obitools3/obidms/capidms.pyx
+++ b/python/obitools3/obidms/capidms.pyx
@@ -1,6 +1,25 @@
-from capidms cimport *
+#from .capidms cimport *
+
+cdef extern from *:
+    ctypedef char* const_char_p "const char*"
+
+cdef extern from "obidms.h":
+    struct OBIDMS_t:
+        pass
+
+    ctypedef OBIDMS_t* OBIDMS_p 
+
+    OBIDMS_p obi_create_dms(const_char_p name)
+    
+    OBIDMS_p obi_open_dms(const_char_p name)
+    
+    int obi_close_dms(OBIDMS_p dms)
+
+
+cdef class OBIDMS:
+    
+    cdef OBIDMS_p pointer
 
-class OBIDMS:
     def __init__(self,name):
         self.pointer = obi_create_dms(name)