diff --git a/scripts/mk_util.py b/scripts/mk_util.py
index 589fc1013..7acbb2c94 100644
--- a/scripts/mk_util.py
+++ b/scripts/mk_util.py
@@ -1298,7 +1298,7 @@ def mk_config():
             'SLINK_OUT_FLAG=/Fe\n')
         extra_opt = ''
         if GIT_HASH:
-            extra_opt = '%s /D Z3GITHASH="%s"' % (extra_opt, GIT_HASH)
+            extra_opt = '%s /D Z3GITHASH=%s' % (extra_opt, GIT_HASH)
         if DEBUG_MODE:
             config.write(
                 'LINK_FLAGS=/nologo /MDd\n'
@@ -1361,7 +1361,7 @@ def mk_config():
         else:
             CPPFLAGS = '%s -D_MP_INTERNAL' % CPPFLAGS
         if GIT_HASH:
-            CPPFLAGS = '%s -DZ3GITHASH="%s"' % (CPPFLAGS, GIT_HASH)
+            CPPFLAGS = '%s -DZ3GITHASH=%s' % (CPPFLAGS, GIT_HASH)
         CXXFLAGS = '%s -c' % CXXFLAGS
         HAS_OMP = test_openmp(CXX)
         if HAS_OMP:
diff --git a/src/shell/main.cpp b/src/shell/main.cpp
index 7c69f66ba..63e604719 100644
--- a/src/shell/main.cpp
+++ b/src/shell/main.cpp
@@ -50,6 +50,9 @@ void error(const char * msg) {
     exit(ERR_CMD_LINE);
 }
 
+#define STRINGIZE(x) #x
+#define STRINGIZE_VALUE_OF(x) STRINGIZE(x)
+
 void display_usage() {
     std::cout << "Z3 [version " << Z3_MAJOR_VERSION << "." << Z3_MINOR_VERSION << "." << Z3_BUILD_NUMBER;
     std::cout << " - ";
@@ -60,7 +63,7 @@ void display_usage() {
 #endif
     std::cout << " bit";
 #ifdef Z3GITHASH
-    std::cout << " - build hashcode " << Z3GITHASH;
+    std::cout << " - build hashcode " << STRINGIZE_VALUE_OF(Z3GITHASH);
 #endif
     std::cout << "]. (C) Copyright 2006-2013 Microsoft Corp.\n";
     std::cout << "Usage: z3 [options] [-file:]file\n";