diff --git a/external/esmf_time_f90/ESMF_Fraction.F90 b/external/esmf_time_f90/ESMF_Fraction.F90
index c6ce3aeb17..a9b276553f 100644
--- a/external/esmf_time_f90/ESMF_Fraction.F90
+++ b/external/esmf_time_f90/ESMF_Fraction.F90
@@ -4,7 +4,7 @@
 !==============================================================================
 !
 !     ESMF Fraction Module
-      module ESMF_FractionMod
+      module WRF_ESMF_FractionMod
 !
 !==============================================================================
 !
@@ -17,7 +17,7 @@ module ESMF_FractionMod
 !===============================================================================
 !BOPI
 !
-! !MODULE: ESMF_FractionMod
+! !MODULE: WRF_ESMF_FractionMod
 !
 ! !DESCRIPTION:
 ! Part of ESMF F90 API wrapper of C++ implemenation
@@ -68,4 +68,4 @@ module ESMF_FractionMod
 
 !------------------------------------------------------------------------------
 
-      end module ESMF_FractionMod
+      end module WRF_ESMF_FractionMod
diff --git a/external/esmf_time_f90/ESMF_Mod.F90 b/external/esmf_time_f90/ESMF_Mod.F90
index c0c832f674..8392c57384 100644
--- a/external/esmf_time_f90/ESMF_Mod.F90
+++ b/external/esmf_time_f90/ESMF_Mod.F90
@@ -6,7 +6,7 @@ MODULE ESMF_Mod
    USE WRF_ESMF_BaseTimeMod
    USE WRF_ESMF_CalendarMod
    USE WRF_ESMF_ClockMod
-   USE esmf_fractionmod
+   USE WRF_ESMF_FractionMod
    USE WRF_ESMF_TimeIntervalMod
    USE WRF_ESMF_TimeMod
    USE WRF_ESMF_AlarmClockMod
diff --git a/external/esmf_time_f90/ESMF_TimeInterval.F90 b/external/esmf_time_f90/ESMF_TimeInterval.F90
index 238b327a1b..43ffd14fb2 100644
--- a/external/esmf_time_f90/ESMF_TimeInterval.F90
+++ b/external/esmf_time_f90/ESMF_TimeInterval.F90
@@ -34,7 +34,7 @@ module WRF_ESMF_TimeIntervalMod
       use WRF_ESMF_BaseTimeMod
 
       ! associated derived types
-      use ESMF_FractionMod, only : ESMF_Fraction
+      use WRF_ESMF_FractionMod, only : ESMF_Fraction
       use WRF_ESMF_CalendarMod
 
       implicit none
diff --git a/external/esmf_time_f90/Meat.F90 b/external/esmf_time_f90/Meat.F90
index 0cc58ba2a2..9aea197968 100644
--- a/external/esmf_time_f90/Meat.F90
+++ b/external/esmf_time_f90/Meat.F90
@@ -562,7 +562,7 @@ SUBROUTINE c_esmc_basetimeeq (time1, time2, outflag)
   USE WRF_ESMF_BaseTimeMod
   USE WRF_ESMF_CalendarMod
   USE WRF_ESMF_ClockMod
-  USE esmf_fractionmod
+  USE WRF_ESMF_FractionMod
   USE WRF_ESMF_TimeIntervalMod
   USE WRF_ESMF_TimeMod
 IMPLICIT NONE
@@ -579,7 +579,7 @@ SUBROUTINE c_esmc_basetimege(time1, time2, outflag)
   USE WRF_ESMF_BaseTimeMod
   USE WRF_ESMF_CalendarMod
   USE WRF_ESMF_ClockMod
-  USE esmf_fractionmod
+  USE WRF_ESMF_FractionMod
   USE WRF_ESMF_TimeIntervalMod
   USE WRF_ESMF_TimeMod
       logical, intent(OUT) :: outflag
@@ -595,7 +595,7 @@ SUBROUTINE c_esmc_basetimegt(time1, time2, outflag)
   USE WRF_ESMF_BaseTimeMod
   USE WRF_ESMF_CalendarMod
   USE WRF_ESMF_ClockMod
-  USE esmf_fractionmod
+  USE WRF_ESMF_FractionMod
   USE WRF_ESMF_TimeIntervalMod
   USE WRF_ESMF_TimeMod
 IMPLICIT NONE
@@ -612,7 +612,7 @@ SUBROUTINE c_esmc_basetimele(time1, time2, outflag)
   USE WRF_ESMF_BaseTimeMod
   USE WRF_ESMF_CalendarMod
   USE WRF_ESMF_ClockMod
-  USE esmf_fractionmod
+  USE WRF_ESMF_FractionMod
   USE WRF_ESMF_TimeIntervalMod
   USE WRF_ESMF_TimeMod
 IMPLICIT NONE
@@ -629,7 +629,7 @@ SUBROUTINE c_esmc_basetimelt(time1, time2, outflag)
   USE WRF_ESMF_BaseTimeMod
   USE WRF_ESMF_CalendarMod
   USE WRF_ESMF_ClockMod
-  USE esmf_fractionmod
+  USE WRF_ESMF_FractionMod
   USE WRF_ESMF_TimeIntervalMod
   USE WRF_ESMF_TimeMod
 IMPLICIT NONE
@@ -646,7 +646,7 @@ SUBROUTINE c_esmc_basetimene(time1, time2, outflag)
   USE WRF_ESMF_BaseTimeMod
   USE WRF_ESMF_CalendarMod
   USE WRF_ESMF_ClockMod
-  USE esmf_fractionmod
+  USE WRF_ESMF_FractionMod
   USE WRF_ESMF_TimeIntervalMod
   USE WRF_ESMF_TimeMod
 IMPLICIT NONE