diff --git a/libs/EXTERNAL/libblifparse/CMakeLists.txt b/libs/EXTERNAL/libblifparse/CMakeLists.txt
index 714c54d775f..a128893fd51 100644
--- a/libs/EXTERNAL/libblifparse/CMakeLists.txt
+++ b/libs/EXTERNAL/libblifparse/CMakeLists.txt
@@ -27,7 +27,9 @@ file(GLOB_RECURSE PARSER_SOURCES src/blif*.y)
 #Make the flex and bison targets
 flex_target(BlifLexer ${LEXER_SOURCES} ${CMAKE_CURRENT_BINARY_DIR}/blif_lexer.gen.cpp
         COMPILE_FLAGS --header-file=${CMAKE_CURRENT_BINARY_DIR}/blif_lexer.gen.hpp)
-bison_target(BlifParser ${PARSER_SOURCES} ${CMAKE_CURRENT_BINARY_DIR}/blif_parser.gen.cpp)
+# Suppress deprecation warnings. See PR #2529
+bison_target(BlifParser ${PARSER_SOURCES} ${CMAKE_CURRENT_BINARY_DIR}/blif_parser.gen.cpp
+        COMPILE_FLAGS -Wno-deprecated)
 add_flex_bison_dependency(BlifLexer BlifParser)
 
 #Suppress warnings in Flex/Bison generated files
diff --git a/libs/EXTERNAL/libsdcparse/CMakeLists.txt b/libs/EXTERNAL/libsdcparse/CMakeLists.txt
index 24a7b2973c8..5ca0e0d8158 100644
--- a/libs/EXTERNAL/libsdcparse/CMakeLists.txt
+++ b/libs/EXTERNAL/libsdcparse/CMakeLists.txt
@@ -27,7 +27,9 @@ file(GLOB_RECURSE PARSER_SOURCES src/sdc*.y)
 #Make the flex and bison targets
 flex_target(SdcLexer ${LEXER_SOURCES} ${CMAKE_CURRENT_BINARY_DIR}/sdc_lexer.gen.cpp
         COMPILE_FLAGS --header-file=${CMAKE_CURRENT_BINARY_DIR}/sdc_lexer.gen.hpp)
-bison_target(SdcParser ${PARSER_SOURCES} ${CMAKE_CURRENT_BINARY_DIR}/sdc_parser.gen.cpp)
+# Suppress deprecation warnings. See PR #2529
+bison_target(SdcParser ${PARSER_SOURCES} ${CMAKE_CURRENT_BINARY_DIR}/sdc_parser.gen.cpp
+        COMPILE_FLAGS -Wno-deprecated)
 add_flex_bison_dependency(SdcLexer SdcParser)