diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 89940c658e..3f1cce59e7 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2020-04-22  Tom de Vries  <tdevries@suse.de>
+
+	PR symtab/25700
+	* dwarf2/read.c (dwarf2_build_psymtabs_hard): Don't create psymtab for
+	CU if already created.
+
 2020-04-21  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>
 
 	* infrun.c (displaced_step_fixup): Switch to the event_thread
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 41db511c85..450c53b519 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -7779,7 +7779,12 @@ dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile)
 			   addrmap_create_mutable (&temp_obstack));
 
   for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units)
-    process_psymtab_comp_unit (per_cu, false, language_minimal);
+    {
+      if (per_cu->v.psymtab != NULL)
+	/* In case a forward DW_TAG_imported_unit has read the CU already.  */
+	continue;
+      process_psymtab_comp_unit (per_cu, false, language_minimal);
+    }
 
   /* This has to wait until we read the CUs, we need the list of DWOs.  */
   process_skeletonless_type_units (dwarf2_per_objfile);
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 10c2a01b4b..f6c52c8e42 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2020-04-22  Tom de Vries  <tdevries@suse.de>
+
+	PR symtab/25700
+	* gdb.dwarf2/imported-unit.exp: Verify that there's only one partial
+	symtab for imported_unit.c.
+
 2020-04-21  Gary Benson <gbenson@redhat.com>
 
 	* gdb.base/advance.c (func): New argument, to match call site.
diff --git a/gdb/testsuite/gdb.dwarf2/imported-unit.exp b/gdb/testsuite/gdb.dwarf2/imported-unit.exp
index 41a7505459..d7b3d4c539 100644
--- a/gdb/testsuite/gdb.dwarf2/imported-unit.exp
+++ b/gdb/testsuite/gdb.dwarf2/imported-unit.exp
@@ -168,6 +168,24 @@ if { $psymtabs_p } {
 } else {
     unsupported $test
 }
+
+# Verify that there's only one partial symtab for imported_unit.c.  Test-case
+# for PR25700.
+set test "no duplicate psymtab for imported_unit.c"
+if { $psymtabs_p } {
+    set line "Partial symtab for source file imported_unit.c"
+    gdb_test_multiple "maint print psymbols" $test {
+	-re -wrap "$line.*$line.*" {
+	    fail $gdb_test_name
+	}
+	-re -wrap "$line.*" {
+	    pass $gdb_test_name
+	}
+    }
+} else {
+    unsupported $test
+}
+
 # Sanity check
 gdb_test "ptype main" "= int \\(void\\)"