diff --git a/cmake/DetectOptions.cmake b/cmake/DetectOptions.cmake
index eeff01f4fe581f4c40343fec4efa27581a259486..4ba6e31805350930e344ace20c1e31e22d00a69f 100644
--- a/cmake/DetectOptions.cmake
+++ b/cmake/DetectOptions.cmake
@@ -115,12 +115,12 @@ endif()
 if(ADIOS2_USE_SysVShMem STREQUAL AUTO)
   if(UNIX)
     include(CheckSymbolExists)
-	CHECK_SYMBOL_EXISTS(shmget "sys/ipc.h;sys/shm.h" HAVE_shmget)
-	if(HAVE_shmget)
-	  set(ADIOS2_HAVE_SysVShMem ON)
-	else()
-	  set(ADIOS2_HAVE_SysVShMem OFF)
-	endif()
+    CHECK_SYMBOL_EXISTS(shmget "sys/ipc.h;sys/shm.h" HAVE_shmget)
+    if(HAVE_shmget)
+      set(ADIOS2_HAVE_SysVShMem ON)
+    else()
+      set(ADIOS2_HAVE_SysVShMem OFF)
+    endif()
   else()
     set(ADIOS2_HAVE_SysVShMem OFF)
   endif()