diff --git a/makefile b/makefile
index 1d2c7a08..93f21eb0 100644
--- a/makefile
+++ b/makefile
@@ -951,7 +951,7 @@ ifeq (${WIN32},)  #*nix Environments (&& cygwin)
       GIT_COMMIT_TIME=$(shell grep 'define SIM_GIT_COMMIT_TIME' sim_rev.h | awk '{ print $$3 }')
     else
       ifeq (git-submodule,$(if $(shell cd .. ; git rev-parse --git-dir 2>/dev/null),git-submodule))
-        GIT_COMMIT_ID=$(shell cd .. ; git submodule status | grep "$(notdir $(realpath .))" | awk '{ print $$1 }')
+        GIT_COMMIT_ID=$(shell cd .. ; git submodule status | grep " $(notdir $(realpath .)) " | awk '{ print $$1 }')
         GIT_COMMIT_TIME=$(shell git --git-dir=$(realpath .)/.git log $(GIT_COMMIT_ID) -1 --pretty="%aI")
       else
         $(info *** Error ***)