diff --git a/debian/changelog b/debian/changelog
index 73d3664b1..f2b5695c0 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+linux (4.19.37-3) unstable; urgency=medium
+
+  * [powerpc*] 64s: Include cpu header (fixes FTBFS)
+
+ -- Ben Hutchings <ben@decadent.org.uk>  Wed, 15 May 2019 23:07:16 +0100
+
 linux (4.19.37-2) unstable; urgency=high
 
   * debian/bin: Fix Python static checker regressions (Closes: #928618)
diff --git a/debian/patches/bugfix/all/spec/powerpc-64s-include-cpu-header.patch b/debian/patches/bugfix/all/spec/powerpc-64s-include-cpu-header.patch
new file mode 100644
index 000000000..564e6d1b8
--- /dev/null
+++ b/debian/patches/bugfix/all/spec/powerpc-64s-include-cpu-header.patch
@@ -0,0 +1,40 @@
+From: Breno Leitao <leitao@debian.org>
+Date: Mon, 22 Oct 2018 11:54:12 -0300
+Subject: powerpc/64s: Include cpu header
+Origin: https://git.kernel.org/linus/42e2acde1237878462b028f5a27d9cc5bea7502c
+
+Current powerpc security.c file is defining functions, as
+cpu_show_meltdown(), cpu_show_spectre_v{1,2} and others, that are being
+declared at linux/cpu.h header without including the header file that
+contains these declarations.
+
+This is being reported by sparse, which thinks that these functions are
+static, due to the lack of declaration:
+
+	arch/powerpc/kernel/security.c:105:9: warning: symbol 'cpu_show_meltdown' was not declared. Should it be static?
+	arch/powerpc/kernel/security.c:139:9: warning: symbol 'cpu_show_spectre_v1' was not declared. Should it be static?
+	arch/powerpc/kernel/security.c:161:9: warning: symbol 'cpu_show_spectre_v2' was not declared. Should it be static?
+	arch/powerpc/kernel/security.c:209:6: warning: symbol 'stf_barrier' was not declared. Should it be static?
+	arch/powerpc/kernel/security.c:289:9: warning: symbol 'cpu_show_spec_store_bypass' was not declared. Should it be static?
+
+This patch simply includes the proper header (linux/cpu.h) to match
+function definition and declaration.
+
+Signed-off-by: Breno Leitao <leitao@debian.org>
+Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
+---
+ arch/powerpc/kernel/security.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
+index f6f469fc4073..9703dce36307 100644
+--- a/arch/powerpc/kernel/security.c
++++ b/arch/powerpc/kernel/security.c
+@@ -4,6 +4,7 @@
+ //
+ // Copyright 2018, Michael Ellerman, IBM Corporation.
+ 
++#include <linux/cpu.h>
+ #include <linux/kernel.h>
+ #include <linux/device.h>
+ #include <linux/seq_buf.h>
diff --git a/debian/patches/series b/debian/patches/series
index 1a3e67d01..89df35626 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -211,6 +211,7 @@ bugfix/all/spec/0027-x86-speculation-mds-Add-mitigations-support-for-MDS.patch
 bugfix/all/spec/0028-x86-mds-Add-MDSUM-variant-to-the-MDS-documentation.patch
 bugfix/all/spec/0029-Documentation-Correct-the-possible-MDS-sysfs-values.patch
 bugfix/all/spec/0030-x86-speculation-mds-Fix-documentation-typo.patch
+bugfix/all/spec/powerpc-64s-include-cpu-header.patch
 
 # Fix exported symbol versions
 bugfix/all/module-disable-matching-missing-version-crc.patch