diff --git a/contrib/pg_upgrade/check.c b/contrib/pg_upgrade/check.c
index d22b6d38e2..56e912d8c3 100644
--- a/contrib/pg_upgrade/check.c
+++ b/contrib/pg_upgrade/check.c
@@ -970,7 +970,7 @@ get_bin_version(ClusterInfo *cluster)
 	int			pre_dot,
 				post_dot;
 
-	snprintf(cmd, sizeof(cmd), "\"%s/pg_ctl\" --version", cluster->bindir);
+	snprintf(cmd, sizeof(cmd), SYSTEMQUOTE "\"%s/pg_ctl\" --version" SYSTEMQUOTE, cluster->bindir);
 
 	if ((output = popen(cmd, "r")) == NULL ||
 		fgets(cmd_output, sizeof(cmd_output), output) == NULL)
diff --git a/src/bin/initdb/initdb.c b/src/bin/initdb/initdb.c
index 55083b254d..b53fa8bd08 100644
--- a/src/bin/initdb/initdb.c
+++ b/src/bin/initdb/initdb.c
@@ -1503,7 +1503,7 @@ bootstrap_template1(void)
 	unsetenv("PGCLIENTENCODING");
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" --boot -x1 %s %s %s",
+			 SYSTEMQUOTE "\"%s\" --boot -x1 %s %s %s" SYSTEMQUOTE,
 			 backend_exec,
 			 data_checksums ? "-k" : "",
 			 boot_options, talkargs);
@@ -1544,7 +1544,7 @@ setup_auth(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -1622,7 +1622,7 @@ get_set_pwd(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -1722,7 +1722,7 @@ setup_depend(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -1755,7 +1755,7 @@ setup_sysviews(void)
 	 * We use -j here to avoid backslashing stuff in system_views.sql
 	 */
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s -j template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s -j template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -1786,7 +1786,7 @@ setup_description(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -1893,7 +1893,7 @@ setup_collation(void)
 
 #if defined(HAVE_LOCALE_T) && !defined(WIN32)
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -2038,7 +2038,7 @@ setup_conversion(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -2076,7 +2076,7 @@ setup_dictionary(void)
 	 * We use -j here to avoid backslashing stuff
 	 */
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s -j template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s -j template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -2127,7 +2127,7 @@ setup_privileges(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -2190,7 +2190,7 @@ setup_schema(void)
 	 * We use -j here to avoid backslashing stuff in information_schema.sql
 	 */
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s -j template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s -j template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -2207,7 +2207,7 @@ setup_schema(void)
 	PG_CMD_CLOSE;
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -2241,7 +2241,7 @@ load_plpgsql(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -2266,7 +2266,7 @@ vacuum_db(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -2322,7 +2322,7 @@ make_template0(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);
 
@@ -2354,7 +2354,7 @@ make_postgres(void)
 	fflush(stdout);
 
 	snprintf(cmd, sizeof(cmd),
-			 "\"%s\" %s template1 >%s",
+			 SYSTEMQUOTE "\"%s\" %s template1 >%s" SYSTEMQUOTE,
 			 backend_exec, backend_options,
 			 DEVNULL);