diff --git a/debian/changelog b/debian/changelog
index 061bb20..85f9f15 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -8,6 +8,7 @@ shim (15.5-1) UNRELEASED; urgency=medium
       -	fix-import_one_mok_state.patch
       - fix_arm64_rela_sections.patch
       - relax_check_for_import_mok_state.patch
+  * Fix format strings for 32-bit builds
   * Tweak setup for dh_auto_test so the tests work
   * Add new build-dep on libefivar-dev for tests
 
diff --git a/debian/patches/fix-32b-format-strings.patch b/debian/patches/fix-32b-format-strings.patch
new file mode 100644
index 0000000..5f6769f
--- /dev/null
+++ b/debian/patches/fix-32b-format-strings.patch
@@ -0,0 +1,45 @@
+diff --git a/post-process-pe.c b/post-process-pe.c
+index 8414a5fa..7efba714 100644
+--- a/post-process-pe.c
++++ b/post-process-pe.c
+@@ -174,7 +174,7 @@ load_pe(const char *const file, void *const data, const size_t datasize,
+ 	}
+ 
+ 	if (FileAlignment % 2 != 0)
+-		errx(1, "%s: Invalid file alignment %ld", file, FileAlignment);
++		errx(1, "%s: Invalid file alignment %ld", file, (long)FileAlignment);
+ 
+ 	if (FileAlignment == 0)
+ 		FileAlignment = 0x200;
+@@ -189,7 +189,7 @@ load_pe(const char *const file, void *const data, const size_t datasize,
+ 	      "Number of RVAs:%"PRIu64" EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES:%d\n",
+ 	      ctx->NumberOfRvaAndSizes, EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES);
+ 	if (EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES < ctx->NumberOfRvaAndSizes)
+-		errx(1, "%s: invalid number of RVAs (%lu entries, max is %d)",
++		errx(1, "%s: invalid number of RVAs (%llu entries, max is %d)",
+ 		     file, ctx->NumberOfRvaAndSizes,
+ 		     EFI_IMAGE_NUMBER_OF_DIRECTORY_ENTRIES);
+ 
+@@ -234,11 +234,11 @@ load_pe(const char *const file, void *const data, const size_t datasize,
+ 		        sizeof(EFI_IMAGE_DATA_DIRECTORY), &sz1))
+ 			debug(ERROR,
+ 			      "ctx->NumberOfRvaAndSizes (%zu) * sizeof(EFI_IMAGE_DATA_DIRECTORY) overflows\n",
+-			      ctx->NumberOfRvaAndSizes);
++			      (size_t)ctx->NumberOfRvaAndSizes);
+ 		else
+ 			debug(ERROR,
+ 			      "ctx->NumberOfRvaAndSizes (%zu) * sizeof(EFI_IMAGE_DATA_DIRECTORY) = %zu\n",
+-			      ctx->NumberOfRvaAndSizes, sz1);
++			      (size_t)ctx->NumberOfRvaAndSizes, sz1);
+ 		debug(ERROR,
+ 		      "space after image header:%zu data directory size:%zu\n",
+ 		      sz0, sz1);
+@@ -271,7 +271,7 @@ load_pe(const char *const file, void *const data, const size_t datasize,
+ 	if (sub(ctx->SizeOfHeaders, SectionHeaderOffset, &sz0) ||
+ 	    div(sz0, EFI_IMAGE_SIZEOF_SECTION_HEADER, &sz0) ||
+ 	    (sz0 < ctx->NumberOfSections)) {
+-		debug(ERROR, "(%zu - %zu) / %d >= %d\n", ctx->SizeOfHeaders,
++		debug(ERROR, "(%zu - %zu) / %d >= %d\n", (size_t)ctx->SizeOfHeaders,
+ 		      SectionHeaderOffset, EFI_IMAGE_SIZEOF_SECTION_HEADER,
+ 		      ctx->NumberOfSections);
+ 		errx(1, "%s: image sections overflow section headers", file);
diff --git a/debian/patches/series b/debian/patches/series
index b979696..c1c3f85 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1 +1,2 @@
 fix-test-includes.patch
+fix-32b-format-strings.patch