diff --git a/pkgconfig/seastar-testing.pc.in b/pkgconfig/seastar-testing.pc.in
index f7d2d7390e6..7859c24dacd 100644
--- a/pkgconfig/seastar-testing.pc.in
+++ b/pkgconfig/seastar-testing.pc.in
@@ -8,11 +8,11 @@ Description: Testing tools for libraries and applications built with Seastar
 Version: @PROJECT_VERSION@
 
 # Dependencies.
-boost_cflags=-I$<JOIN:@Boost_INCLUDE_DIRS@, -I>
+boost_cflags=-I$<JOIN:@Boost_INCLUDE_DIRS@, -I> -D$<JOIN:$<TARGET_PROPERTY:Boost::dynamic_linking,INTERFACE_COMPILE_DEFINITIONS>, -D>
 boost_unit_test_libs=@Boost_UNIT_TEST_FRAMEWORK_LIBRARY@
 
 # Us.
-seastar_testing_cflags=-DBoost_TEST_DYN_LINK
+seastar_testing_cflags=
 seastar_testing_libs=${libdir}/$<TARGET_FILE_NAME:seastar_testing>
 
 Requires: seastar >= 1.0