diff --git a/src/modules/fsresizer/CMakeLists.txt b/src/modules/fsresizer/CMakeLists.txt
index 12349c835..36c8c764c 100644
--- a/src/modules/fsresizer/CMakeLists.txt
+++ b/src/modules/fsresizer/CMakeLists.txt
@@ -2,12 +2,17 @@ find_package( KPMcore 3.3 )
 find_package( Qt5 REQUIRED DBus )  # Needed for KPMCore
 find_package( KF5 REQUIRED I18n WidgetsAddons )  # Needed for KPMCore
 
+set( _partition_defs "" )
+
 if ( KPMcore_FOUND )
     include_directories( ${KPMCORE_INCLUDE_DIR} )
     include_directories( ${PROJECT_BINARY_DIR}/src/libcalamares )
 
     if ( KPMcore_VERSION VERSION_GREATER "3.3.0")
-        add_definitions(-DWITH_KPMCOREGT33) # kpmcore greater than 3.3
+        list( APPEND _partition_defs WITH_KPMCORE331API) # kpmcore > 3.3.0 with deprecations
+    endif()
+    if ( KPMcore_VERSION VERSION_GREATER "3.90")
+        list( APPEND _partition_defs WITH_KPMCORE4API) # kpmcore 4 with new API
     endif()
 
     # The PartitionIterator is a small class, and it's easiest -- but also a
@@ -21,6 +26,7 @@ if ( KPMcore_FOUND )
         LINK_PRIVATE_LIBRARIES
             kpmcore
             calamares
+        COMPILE_DEFINITIONS ${_partition_defs}
         SHARED_LIB
     )
 
@@ -38,7 +44,8 @@ if ( KPMcore_FOUND )
                 Qt5::Test
         )
         set_target_properties( fsresizertest PROPERTIES AUTOMOC TRUE )
-        target_include_directories(fsresizertest PRIVATE /usr/local/include )
+        target_include_directories( fsresizertest PRIVATE /usr/local/include )
+        target_compile_definitions( fsresizertest PRIVATE ${_partition_defs} )
     endif()
 else()
     calamares_skip_module( "fsresizer (missing suitable KPMcore)" )
diff --git a/src/modules/fsresizer/ResizeFSJob.cpp b/src/modules/fsresizer/ResizeFSJob.cpp
index fa197e476..61fbc6898 100644
--- a/src/modules/fsresizer/ResizeFSJob.cpp
+++ b/src/modules/fsresizer/ResizeFSJob.cpp
@@ -120,7 +120,7 @@ ResizeFSJob::PartitionMatch
 ResizeFSJob::findPartition( CoreBackend* backend )
 {
     using DeviceList = QList< Device* >;
-#ifdef WITH_KPMCOREGT33
+#ifdef WITH_KPMCORE331API
     DeviceList devices = backend->scanDevices( /* not includeReadOnly, not includeLoopback */ ScanFlag(0) );
 #else
     DeviceList devices = backend->scanDevices( /* excludeReadOnly */ true );
diff --git a/src/modules/partition/CMakeLists.txt b/src/modules/partition/CMakeLists.txt
index 56520845e..9bcace064 100644
--- a/src/modules/partition/CMakeLists.txt
+++ b/src/modules/partition/CMakeLists.txt
@@ -28,7 +28,10 @@ set_package_properties(
 
 if ( KPMcore_FOUND )
     if ( KPMcore_VERSION VERSION_GREATER "3.3.0")
-        add_definitions(-DWITH_KPMCOREGT33) # kpmcore greater than 3.3
+        list( APPEND _partition_defs WITH_KPMCORE331API) # kpmcore > 3.3.0 with deprecations
+    endif()
+    if ( KPMcore_VERSION VERSION_GREATER "3.90")
+        list( APPEND _partition_defs WITH_KPMCORE4API) # kpmcore 4 with new API
     endif()
 
     include_directories( ${KPMCORE_INCLUDE_DIR} )
diff --git a/src/modules/partition/core/DeviceList.cpp b/src/modules/partition/core/DeviceList.cpp
index cef1c0414..a7f9ff44c 100644
--- a/src/modules/partition/core/DeviceList.cpp
+++ b/src/modules/partition/core/DeviceList.cpp
@@ -107,7 +107,7 @@ QList< Device* > getDevices( DeviceType which, qint64 minimumSize )
     bool writableOnly = (which == DeviceType::WritableOnly);
 
     CoreBackend* backend = CoreBackendManager::self()->backend();
-#ifdef WITH_KPMCOREGT33
+#ifdef WITH_KPMCORE331API
     DeviceList devices = backend->scanDevices( /* not includeReadOnly, not includeLoopback */ ScanFlag(0) );
 #else
     DeviceList devices = backend->scanDevices( /* excludeReadOnly */ true );
diff --git a/src/modules/partition/core/KPMHelpers.h b/src/modules/partition/core/KPMHelpers.h
index f1b8bd8a9..b1c3832fc 100644
--- a/src/modules/partition/core/KPMHelpers.h
+++ b/src/modules/partition/core/KPMHelpers.h
@@ -33,7 +33,7 @@ class Partition;
 class PartitionNode;
 class PartitionRole;
 
-#ifdef WITH_KPMCOREGT33
+#ifdef WITH_KPMCORE331API
 #define KPM_PARTITION_FLAG(x) PartitionTable::Flag::x
 #define KPM_PARTITION_STATE(x) Partition::State::x
 #define KPM_PARTITION_FLAG_ESP PartitionTable::Flag::Boot
diff --git a/src/modules/partition/core/PartitionCoreModule.cpp b/src/modules/partition/core/PartitionCoreModule.cpp
index f183d6c40..f50510da7 100644
--- a/src/modules/partition/core/PartitionCoreModule.cpp
+++ b/src/modules/partition/core/PartitionCoreModule.cpp
@@ -683,14 +683,17 @@ PartitionCoreModule::scanForLVMPVs()
         }
     }
 
-#ifdef WITH_KPMCOREGT33
+#if defined( WITH_KPMCORE4API )
     VolumeManagerDevice::scanDevices( physicalDevices );
-
+    for ( auto p : LVM::pvList::list() )
+#else
+#if defined( WITH_KPMCORE331API )
+    LvmDevice::scanSystemLVM( physicalDevices );
     for ( auto p : LVM::pvList::list() )
 #else
     LvmDevice::scanSystemLVM( physicalDevices );
-
     for ( auto p : LVM::pvList )
+#endif
 #endif
     {
         m_lvmPVs << p.partition().data();
@@ -724,7 +727,7 @@ PartitionCoreModule::scanForLVMPVs()
                     if ( innerFS && innerFS->type() == FileSystem::Type::Lvm2_PV )
                         m_lvmPVs << p;
                 }
-#ifdef WITH_KPMCOREGT33
+#ifdef WITH_KPMCORE4API
                 else if ( p->fileSystem().type() == FileSystem::Type::Luks2 )
                 {
                     // Encrypted LVM PVs
diff --git a/src/modules/partition/gui/ChoicePage.cpp b/src/modules/partition/gui/ChoicePage.cpp
index 10f73964f..edeee11a6 100644
--- a/src/modules/partition/gui/ChoicePage.cpp
+++ b/src/modules/partition/gui/ChoicePage.cpp
@@ -51,7 +51,7 @@
 
 #include <kpmcore/core/device.h>
 #include <kpmcore/core/partition.h>
-#ifdef WITH_KPMCOREGT33
+#ifdef WITH_KPMCORE4API
 #include <kpmcore/core/softwareraid.h>
 #endif
 
@@ -1224,7 +1224,7 @@ ChoicePage::setupActions()
     bool atLeastOneIsMounted = false;  // Suppress 'erase' if so
     bool isInactiveRAID = false;
 
-#ifdef WITH_KPMCOREGT33
+#ifdef WITH_KPMCORE4API
     if ( currentDevice->type() == Device::Type::SoftwareRAID_Device &&
          static_cast< SoftwareRAID* >(currentDevice)->status() == SoftwareRAID::Status::Inactive )
     {
diff --git a/src/modules/partition/gui/PartitionPage.cpp b/src/modules/partition/gui/PartitionPage.cpp
index 5f16e9dc1..22398bddb 100644
--- a/src/modules/partition/gui/PartitionPage.cpp
+++ b/src/modules/partition/gui/PartitionPage.cpp
@@ -49,7 +49,7 @@
 // KPMcore
 #include <kpmcore/core/device.h>
 #include <kpmcore/core/partition.h>
-#ifdef WITH_KPMCOREGT33
+#ifdef WITH_KPMCORE4API
 #include <kpmcore/core/softwareraid.h>
 #endif
 #include <kpmcore/ops/deactivatevolumegroupoperation.h>
@@ -162,7 +162,7 @@ PartitionPage::updateButtons()
         {
             createTable = true;
 
-#ifdef WITH_KPMCOREGT33
+#ifdef WITH_KPMCORE4API
             if ( device->type() == Device::Type::SoftwareRAID_Device &&
                  static_cast< SoftwareRAID* >(device)->status() == SoftwareRAID::Status::Inactive )
             {
diff --git a/src/modules/partition/tests/CMakeLists.txt b/src/modules/partition/tests/CMakeLists.txt
index 7b40c34a5..ac3968df9 100644
--- a/src/modules/partition/tests/CMakeLists.txt
+++ b/src/modules/partition/tests/CMakeLists.txt
@@ -32,4 +32,5 @@ if( ECM_FOUND AND BUILD_TESTING )
     )
 
     set_target_properties( partitionjobtests PROPERTIES AUTOMOC TRUE )
+    target_compile_definitions( partitionjobtests PRIVATE ${_partition_defs} )
 endif()