diff --git a/CMakeLists.txt b/CMakeLists.txt
index b006ed34ea..dc28fd5476 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -52,6 +52,7 @@ set(CMAKE_SHARED_MODULE_PREFIX "")
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 include(GNUInstallDirs)
 add_compile_definitions(_GNU_SOURCE)
+add_definitions(-D_FILE_OFFSET_BITS=64)
 
 function(makemacros)
 	set(prefix ${CMAKE_INSTALL_PREFIX})
diff --git a/rpm.pc.in b/rpm.pc.in
index 46d42e7a3d..791303e173 100644
--- a/rpm.pc.in
+++ b/rpm.pc.in
@@ -11,6 +11,6 @@ URL: @CMAKE_PROJECT_HOMEPAGE_URL@
 Requires: popt
 Requires.private: @ZSTD_REQUIRES@
 # Conflicts:
-Cflags: -I${includedir}
+Cflags: -I${includedir} -D_FILE_OFFSET_BITS=64
 Libs: -L${libdir} -lrpm -lrpmio
 Libs.private: -lpopt -lrt -lpthread @WITH_LZMA_LIB@ @WITH_BZ2_LIB@ @WITH_ZLIB_LIB@ @LUA_LIBS@