diff --git a/CMakeLists.txt b/CMakeLists.txt
index 882e4bbe..680d1120 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,7 @@ set(OPENEXR_VERSION_MINOR 3)
 set(OPENEXR_VERSION_PATCH 0)
 set(OPENEXR_VERSION ${OPENEXR_VERSION_MAJOR}.${OPENEXR_VERSION_MINOR}.${OPENEXR_VERSION_PATCH})
 set(OPENEXR_VERSION_API ${OPENEXR_VERSION_MAJOR}_${OPENEXR_VERSION_MINOR})
+set(${OPENEXR_SOVERSION} 24)
 
 project(OpenEXR VERSION ${OPENEXR_VERSION})
 
diff --git a/IlmBase/Half/CMakeLists.txt b/IlmBase/Half/CMakeLists.txt
index c23bc6a5..3d24cd78 100644
--- a/IlmBase/Half/CMakeLists.txt
+++ b/IlmBase/Half/CMakeLists.txt
@@ -43,7 +43,7 @@ IF (OPENEXR_BUILD_SHARED)
   SET_TARGET_PROPERTIES ( Half
     PROPERTIES
     VERSION ${OPENEXR_VERSION}
-    SOVERSION ${OPENEXR_VERSION_MAJOR}
+    SOVERSION ${OPENEXR_SOVERSION}
     OUTPUT_NAME "Half${ILMBASE_LIBSUFFIX}"
     )
 
diff --git a/IlmBase/Imath/CMakeLists.txt b/IlmBase/Imath/CMakeLists.txt
index e5c30025..8faa97a0 100644
--- a/IlmBase/Imath/CMakeLists.txt
+++ b/IlmBase/Imath/CMakeLists.txt
@@ -24,7 +24,7 @@ IF ( OPENEXR_BUILD_SHARED )
   SET_TARGET_PROPERTIES ( Imath
     PROPERTIES
     VERSION ${OPENEXR_VERSION}
-    SOVERSION ${OPENEXR_VERSION_MAJOR}
+    SOVERSION ${OPENEXR_SOVERSION}
     OUTPUT_NAME "Imath${ILMBASE_LIBSUFFIX}"
     )
 ENDIF ()