diff --git a/Foundation/CMakeLists.txt b/Foundation/CMakeLists.txt
index 4fedfd5..741313b 100644
--- a/Foundation/CMakeLists.txt
+++ b/Foundation/CMakeLists.txt
@@ -35,6 +35,22 @@ if (POCO_UNBUNDLED)
 	find_package(PCRE REQUIRED)
 	find_package(ZLIB REQUIRED)
 
+	add_definitions(
+		-D_pcre_utf8_table1=_poco_pcre_utf8_table1
+		-D_pcre_utf8_table1_size=_poco_pcre_utf8_table1_size
+		-D_pcre_utf8_table2=_poco_pcre_utf8_table2
+		-D_pcre_utf8_table3=_poco_pcre_utf8_table3
+		-D_pcre_utf8_table4=_poco_pcre_utf8_table4
+		-D_pcre_utt_names=_poco_pcre_utt_names
+		-D_pcre_utt=_poco_pcre_utt
+		-D_pcre_utt_size=_poco_pcre_utt_size
+		-D_pcre_OP_lengths=_poco_pcre_OP_lengths
+		-D_pcre_hspace_list=_poco_pcre_hspace_list
+		-D_pcre_vspace_list=_poco_pcre_vspace_list
+		-D_pcre_ucp_gentype=_poco_pcre_ucp_gentype
+		-D_pcre_ucp_gbtable=_poco_pcre_ucp_gbtable
+	)
+
 	#HACK: Unicode.cpp requires functions from these files. The can't be taken from the library
 	POCO_SOURCES( SRCS RegExp
 		src/pcre_ucd.c