diff --git a/tools/lib/api/Build b/tools/lib/api/Build
index 954c644f7ad9..6e2373db5598 100644
--- a/tools/lib/api/Build
+++ b/tools/lib/api/Build
@@ -2,3 +2,8 @@ libapi-y += fd/
 libapi-y += fs/
 libapi-y += cpu.o
 libapi-y += debug.o
+libapi-y += str_error_r.o
+
+$(OUTPUT)str_error_r.o: ../str_error_r.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 2fa7d8b69873..91c5f6e1af59 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -70,7 +70,6 @@ libperf-y += stat.o
 libperf-y += stat-shadow.o
 libperf-y += record.o
 libperf-y += srcline.o
-libperf-y += str_error_r.o
 libperf-y += data.o
 libperf-y += tsc.o
 libperf-y += cloexec.o
@@ -176,10 +175,6 @@ $(OUTPUT)util/libstring.o: ../lib/string.c FORCE
 	$(call rule_mkdir)
 	$(call if_changed_dep,cc_o_c)
 
-$(OUTPUT)util/str_error_r.o: ../lib/str_error_r.c FORCE
-	$(call rule_mkdir)
-	$(call if_changed_dep,cc_o_c)
-
 $(OUTPUT)util/hweight.o: ../lib/hweight.c FORCE
 	$(call rule_mkdir)
 	$(call if_changed_dep,cc_o_c)
diff --git a/tools/perf/util/python-ext-sources b/tools/perf/util/python-ext-sources
index 5065ec98049c..b7d4f4aeee61 100644
--- a/tools/perf/util/python-ext-sources
+++ b/tools/perf/util/python-ext-sources
@@ -13,7 +13,6 @@ util/cpumap.c
 ../lib/bitmap.c
 ../lib/find_bit.c
 ../lib/hweight.c
-../lib/str_error_r.c
 ../lib/vsprintf.c
 util/thread_map.c
 util/util.c