diff --git a/build/makefile_base.mak b/build/makefile_base.mak
index d3385d87..b542d072 100644
--- a/build/makefile_base.mak
+++ b/build/makefile_base.mak
@@ -837,7 +837,7 @@ $(WINE_CONFIGURE_FILES64): $(MAKEFILE_DEP) | faudio64 vkd3d64 $(WINE_OBJ64) biso
 			STRIP=$(STRIP_QUOTED) \
 			BISON=$(abspath $(BISON_BIN64)) \
 			CFLAGS="-I$(abspath $(TOOLS_DIR64))/include -g $(COMMON_FLAGS)" \
-			CXXFLAGS="-I$(abspath $(TOOLS_DIR64))/include -g $(COMMON_FLAGS) -fno-gnu-unique -std=c++17" \
+			CXXFLAGS="-I$(abspath $(TOOLS_DIR64))/include -g $(COMMON_FLAGS) -std=c++17" \
 			LDFLAGS=-L$(abspath $(TOOLS_DIR64))/lib \
 			PKG_CONFIG_PATH=$(abspath $(TOOLS_DIR64))/lib/pkgconfig \
 			CC=$(CC_QUOTED) \
@@ -854,7 +854,7 @@ $(WINE_CONFIGURE_FILES32): $(MAKEFILE_DEP) | faudio32 vkd3d32 $(WINE_OBJ32) biso
 			STRIP=$(STRIP_QUOTED) \
 			BISON=$(abspath $(BISON_BIN32)) \
 			CFLAGS="-I$(abspath $(TOOLS_DIR32))/include -g $(COMMON_FLAGS)" \
-			CXXFLAGS="-I$(abspath $(TOOLS_DIR32))/include -g $(COMMON_FLAGS) -fno-gnu-unique -std=c++17" \
+			CXXFLAGS="-I$(abspath $(TOOLS_DIR32))/include -g $(COMMON_FLAGS) -std=c++17" \
 			LDFLAGS=-L$(abspath $(TOOLS_DIR32))/lib \
 			PKG_CONFIG_PATH=$(abspath $(TOOLS_DIR32))/lib/pkgconfig \
 			CC=$(CC_QUOTED) \