diff --git a/src/PHYEX/micro/modd_param_lima.f90 b/src/PHYEX/micro/modd_param_lima.f90
index 61fd573f42c169d41cb4d217e604e399ea4efe13..1a903452b9a90973eb754f80e9a830f719875686 100644
--- a/src/PHYEX/micro/modd_param_lima.f90
+++ b/src/PHYEX/micro/modd_param_lima.f90
@@ -721,7 +721,7 @@ IF(LLCHECK) THEN
            &" YOU HAVE TO FILL HINI_CCN ")
   END IF
 
-  IF(LACTI .AND. NMOD_CCN == 0) THEN
+  IF(LACTI .AND. NMOD_CCN == 0 .AND. NMOM_C >= 2) THEN
     CALL PRINT_MSG(NVERB_FATAL, 'GEN', 'MODD_PARAM_LIMA', &
            &"ACTIVATION OF AEROSOL PARTICLES IS NOT " // &
            &"POSSIBLE IF NMOD_CCN HAS VALUE ZERO. YOU HAVE TO SET AN UPPER " // &