diff --git a/src/include/ngspice/miftypes.h b/src/include/ngspice/miftypes.h
index b18663d9c..a9ae17c96 100644
--- a/src/include/ngspice/miftypes.h
+++ b/src/include/ngspice/miftypes.h
@@ -188,7 +188,7 @@ typedef enum {
  * Complex numbers
  */
 
-typedef struct {
+typedef struct Mif_Complex {
 
     double  real;
     double  imag;