diff --git a/libs/gst/check/Makefile.am b/libs/gst/check/Makefile.am
index 70b2f5f1da..724d6a626e 100644
--- a/libs/gst/check/Makefile.am
+++ b/libs/gst/check/Makefile.am
@@ -89,16 +89,17 @@ LIBGSTCHECK_EXPORTED_SYMBOLS = \
 	$(LIBGSTCHECK_EXPORTED_VARS) \
 	$(LIBGSTCHECK_EXPORTED_FUNCS)
 
+# Please do not even think about changing the alphabet below into A-Za-z.
+# It is there for purpose. (Bug #602093)
+CHECK_SYMS=`$(SED) -n -e 's/^..*CK_EXPORT[ ]\{1,\}\([_0-9ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz]\{1,\}\)..*$$/\1/p' @top_srcdir@/libs/gst/check/libcheck/check.h.in`
 print-check-symbols:
-	CHECK_SYMS=`$(SED) -n -e 's/^..*CK_EXPORT[ ]\{1,\}\([_0-9A-Za-z]\{1,\}\)..*$$/\1/p' @top_srcdir@/libs/gst/check/libcheck/check.h.in` ; \
-	for s in $$CHECK_SYMS; do \
+	for s in $(CHECK_SYMS); do \
 	  echo $$s; \
 	done;
 
 $(SYMBOLS_FILE):
-	CHECK_SYMS=`$(SED) -n -e 's/^..*CK_EXPORT[ ]\{1,\}\([_0-9A-Za-z]\{1,\}\)..*$$/\1/p' @top_srcdir@/libs/gst/check/libcheck/check.h.in` ; \
 	rm -f $(SYMBOLS_FILE) 2>/dev/null; \
-	for s in $(LIBGSTCHECK_EXPORTED_SYMBOLS) $$CHECK_SYMS; do \
+	for s in $(LIBGSTCHECK_EXPORTED_SYMBOLS) $(CHECK_SYMS); do \
 	  echo $$s >> $(SYMBOLS_FILE); \
 	done