diff --git a/jerry-core/CMakeLists.txt b/jerry-core/CMakeLists.txt
index 240138f52..92a65baf2 100644
--- a/jerry-core/CMakeLists.txt
+++ b/jerry-core/CMakeLists.txt
@@ -400,6 +400,11 @@ target_include_directories(${JERRY_CORE_NAME} PRIVATE ${INCLUDE_CORE_PRIVATE})
 
 set(JERRY_CORE_PKGCONFIG_REQUIRES)
 set(JERRY_CORE_PKGCONFIG_LIBS)
+set(JERRY_CORE_PKGCONFIG_CFLAGS)
+
+if(ENABLE_LTO)
+  set(JERRY_CORE_PKGCONFIG_CFLAGS "${JERRY_CORE_PKGCONFIG_CFLAGS} -flto")
+endif()
 
 if(JERRY_LIBM)
   target_link_libraries(${JERRY_CORE_NAME} jerry-libm)
diff --git a/jerry-core/libjerry-core.pc.in b/jerry-core/libjerry-core.pc.in
index ed38855cf..977172397 100644
--- a/jerry-core/libjerry-core.pc.in
+++ b/jerry-core/libjerry-core.pc.in
@@ -9,4 +9,4 @@ Version: 1.0
 Requires.private: @JERRY_CORE_PKGCONFIG_REQUIRES@ # NOTE: libjerry-port-default* is not added as a required package
 Libs: -L${libdir} -ljerry-core
 Libs.private: @JERRY_CORE_PKGCONFIG_LIBS@
-Cflags: -I${includedir}
+Cflags: -I${includedir} @JERRY_CORE_PKGCONFIG_CFLAGS@