diff --git a/stringfish/src/Makevars.in b/stringfish/src/Makevars.in
index 821aaea..891d022 100644
--- a/stringfish/src/Makevars.in
+++ b/stringfish/src/Makevars.in
@@ -1,5 +1,5 @@
 PKG_CPPFLAGS=-DRCPP_USE_UNWIND_PROTECT -DRCPP_NO_RTTI -DPCRE2_CODE_UNIT_WIDTH=8 -DHAVE_CONFIG_H @PCRE2_BUNDLED@ -I. @INCLUDE_PATHS@
-PKG_LIBS=-lpthread -L. -lSFPCRE2 @ADD_LIBS@ $(shell ${R_HOME}/bin/Rscript -e "RcppParallel::RcppParallelLibs()")
+PKG_LIBS := -lxxhash -lpthread -L. -lSFPCRE2 @ADD_LIBS@ $(shell ${R_HOME}/bin/Rscript -e "RcppParallel::RcppParallelLibs()")
 
 LIBPCRE2 = PCRE2/pcre2_chartables.o \
 	PCRE2/pcre2_auto_possess.o \
diff --git a/stringfish/src/sf_functions.cpp b/stringfish/src/sf_functions.cpp
index 17f545b..a43a87e 100644
--- a/stringfish/src/sf_functions.cpp
+++ b/stringfish/src/sf_functions.cpp
@@ -99,7 +99,7 @@ List get_pcre2_info() {
 #include <unordered_map>
 #include <fstream>
 
-#include "xxhash/xxhash.c"
+#include <xxhash.h>
 
 ////////////////////////////////////////////////////////////////////////////////
 // iconv helper class