diff --git a/Changes b/Changes
index bc3bc63af..26d05d9c9 100644
--- a/Changes
+++ b/Changes
@@ -171,6 +171,7 @@ Feature wishes:
 - PR#5774: Add bswap primitives for amd64 and arm
 - PR#5827: provide a dynamic command line parsing mechanism
 - PR#5864: Add a find operation to Set
+- PR#6049: support for OpenBSD/macppc platform
 
 Tools:
 - OCamlbuild now features a bin_annot tag to generate .cmt files.
diff --git a/asmcomp/power/emit.mlp b/asmcomp/power/emit.mlp
index 794478f6f..283312e7e 100644
--- a/asmcomp/power/emit.mlp
+++ b/asmcomp/power/emit.mlp
@@ -56,7 +56,7 @@ let supports_backtraces =
 
 let emit_symbol =
   match Config.system with
-  | "elf" | "bsd" -> (fun s -> Emitaux.emit_symbol '.' s)
+  | "elf" | "bsd" | "bsd_elf" -> (fun s -> Emitaux.emit_symbol '.' s)
   | "rhapsody"    -> (fun s -> emit_char '_'; Emitaux.emit_symbol '$' s)
   | _ -> assert false
 
@@ -64,7 +64,7 @@ let emit_symbol =
 
 let label_prefix =
   match Config.system with
-  | "elf" | "bsd" -> ".L"
+  | "elf" | "bsd" | "bsd_elf" -> ".L"
   | "rhapsody" -> "L"
   | _ -> assert false
 
@@ -78,19 +78,19 @@ let emit_data_label lbl =
 
 let data_space =
   match Config.system with
-  | "elf" | "bsd" -> "	.section \".data\"\n"
+  | "elf" | "bsd" | "bsd_elf" -> "	.section \".data\"\n"
   | "rhapsody"    -> "	.data\n"
   | _ -> assert false
 
 let code_space =
   match Config.system with
-  | "elf" | "bsd" -> "	.section \".text\"\n"
+  | "elf" | "bsd" | "bsd_elf" -> "	.section \".text\"\n"
   | "rhapsody"    -> "	.text\n"
   | _ -> assert false
 
 let rodata_space =
   match Config.system with
-  | "elf" | "bsd" -> "	.section \".rodata\"\n"
+  | "elf" | "bsd" | "bsd_elf" -> "	.section \".rodata\"\n"
   | "rhapsody"    -> "	.const\n"
   | _ -> assert false
 
@@ -158,7 +158,7 @@ let is_native_immediate n =
 
 let emit_upper emit_fun arg =
   match Config.system with
-  | "elf" | "bsd" ->
+  | "elf" | "bsd" | "bsd_elf" ->
       emit_fun arg; emit_string "@ha"
   | "rhapsody" ->
       emit_string "ha16("; emit_fun arg; emit_string ")"
@@ -166,7 +166,7 @@ let emit_upper emit_fun arg =
 
 let emit_lower emit_fun arg =
   match Config.system with
-  | "elf" | "bsd" ->
+  | "elf" | "bsd" | "bsd_elf" ->
       emit_fun arg; emit_string "@l"
   | "rhapsody" ->
       emit_string "lo16("; emit_fun arg; emit_string ")"
@@ -844,7 +844,7 @@ let fundecl fundecl =
   else
   `	.globl	{emit_symbol fundecl.fun_name}\n`;
   begin match Config.system with
-  | "elf" | "bsd" ->
+  | "elf" | "bsd" | "bsd_elf" ->
       `	.type	{emit_symbol fundecl.fun_name}, @function\n`
   | _ -> ()
   end;
@@ -889,8 +889,11 @@ let fundecl fundecl =
 
 let declare_global_data s =
   `	.globl	{emit_symbol s}\n`;
-  if Config.system = "elf" || Config.system = "bsd" then
+  match Config.system with
+  | "elf" | "bsd" | "bsd_elf" ->
     `	.type	{emit_symbol s}, @object\n`
+  | "rhapsody" -> ()
+  | _ -> assert false
 
 let emit_item = function
     Cglobal_symbol s ->
diff --git a/asmcomp/power/proc.ml b/asmcomp/power/proc.ml
index 07eb8b67c..203e8a9ef 100644
--- a/asmcomp/power/proc.ml
+++ b/asmcomp/power/proc.ml
@@ -186,7 +186,7 @@ let poweropen_external_conventions first_int last_int
 let loc_external_arguments =
   match Config.system with
   | "rhapsody" -> poweropen_external_conventions 0 7 100 112
-  | "elf" | "bsd" -> calling_conventions 0 7 100 107 outgoing 8
+  | "elf" | "bsd" | "bsd_elf" -> calling_conventions 0 7 100 107 outgoing 8
   | _ -> assert false
 
 let extcall_use_push = false
diff --git a/asmrun/Makefile b/asmrun/Makefile
index 89adaa2e0..5ebf7aadb 100644
--- a/asmrun/Makefile
+++ b/asmrun/Makefile
@@ -81,6 +81,9 @@ install-prof:
 	cp libasmrunp.a $(LIBDIR)/libasmrunp.a
 	cd $(LIBDIR); $(RANLIB) libasmrunp.a
 
+power-bsd_elf.S: power-elf.S
+	cp power-elf.S power-bsd_elf.S
+
 power.o: power-$(SYSTEM).o
 	cp power-$(SYSTEM).o power.o
 
diff --git a/asmrun/signals_osdep.h b/asmrun/signals_osdep.h
index 5e07b2c2d..ff1984754 100644
--- a/asmrun/signals_osdep.h
+++ b/asmrun/signals_osdep.h
@@ -237,7 +237,7 @@
 
 /****************** PowerPC, BSD */
 
-#elif defined(TARGET_power) && defined(SYS_bsd)
+#elif defined(TARGET_power) && (defined(SYS_bsd) || defined(SYS_bsd_elf))
 
   #define DECLARE_SIGNAL_HANDLER(name) \
     static void name(int sig, int code, struct sigcontext * context)
diff --git a/configure b/configure
index d721aa466..f9ebbd0e8 100755
--- a/configure
+++ b/configure
@@ -690,6 +690,7 @@ case "$host" in
   i[3456]86-*-gnu*)             arch=i386; system=gnu;;
   powerpc*-*-linux*)            arch=power; model=ppc; system=elf;;
   powerpc-*-netbsd*)            arch=power; model=ppc; system=elf;;
+  powerpc-*-openbsd*)           arch=power; model=ppc; system=bsd_elf;;
   powerpc-*-rhapsody*)          arch=power; model=ppc; system=rhapsody;;
   powerpc-*-darwin*)            arch=power; system=rhapsody
                                 if $arch64; then model=ppc64; else model=ppc; fi;;
@@ -767,7 +768,7 @@ case "$arch,$model,$system" in
                     aspp='gcc -c';;
   power,*,elf)      as='as -u -m ppc'
                     aspp='gcc -c';;
-  power,*,bsd)      as='as'
+  power,*,bsd*)     as='as'
                     aspp='gcc -c';;
   power,*,rhapsody) as="as -arch $model"
                     aspp="$bytecc -c";;