diff --git a/src/cmd/5l/asm.c b/src/cmd/5l/asm.c
index 2c9e50d00e..28de6255a6 100644
--- a/src/cmd/5l/asm.c
+++ b/src/cmd/5l/asm.c
@@ -294,6 +294,7 @@ asmb(void)
 	ElfPhdr *ph, *pph;
 	ElfShdr *sh;
 	Section *sect;
+	int o;
 
 	if(debug['v'])
 		Bprint(&bso, "%5.2f asmb\n", cputime());
@@ -462,6 +463,17 @@ asmb(void)
 		pph->paddr = INITTEXT - HEADR + pph->off;
 		pph->align = INITRND;
 
+		/*
+		 * PHDR must be in a loaded segment. Adjust the text
+		 * segment boundaries downwards to include it.
+		 */
+		o = segtext.vaddr - pph->vaddr;
+		segtext.vaddr -= o;
+		segtext.len += o;
+		o = segtext.fileoff - pph->off;
+		segtext.fileoff -= o;
+		segtext.filelen += o;
+
 		if(!debug['d']) {
 			/* interpreter for dynamic linking */
 			sh = newElfShdr(elfstr[ElfStrInterp]);
diff --git a/src/cmd/6l/asm.c b/src/cmd/6l/asm.c
index 9136e03794..581ec5a20b 100644
--- a/src/cmd/6l/asm.c
+++ b/src/cmd/6l/asm.c
@@ -699,6 +699,7 @@ asmb(void)
 	ElfPhdr *ph, *pph;
 	ElfShdr *sh;
 	Section *sect;
+	int o;
 
 	if(debug['v'])
 		Bprint(&bso, "%5.2f asmb\n", cputime());
@@ -862,6 +863,17 @@ asmb(void)
 		pph->paddr = INITTEXT - HEADR + pph->off;
 		pph->align = INITRND;
 
+		/*
+		 * PHDR must be in a loaded segment. Adjust the text
+		 * segment boundaries downwards to include it.
+		 */
+		o = segtext.vaddr - pph->vaddr;
+		segtext.vaddr -= o;
+		segtext.len += o;
+		o = segtext.fileoff - pph->off;
+		segtext.fileoff -= o;
+		segtext.filelen += o;
+
 		if(!debug['d']) {
 			/* interpreter */
 			sh = newElfShdr(elfstr[ElfStrInterp]);
diff --git a/src/cmd/8l/asm.c b/src/cmd/8l/asm.c
index e1ccfb8a3d..82bff3e1ed 100644
--- a/src/cmd/8l/asm.c
+++ b/src/cmd/8l/asm.c
@@ -665,6 +665,7 @@ asmb(void)
 	ElfShdr *sh;
 	Section *sect;
 	Sym *sym;
+	int o;
 	int i;
 
 	if(debug['v'])
@@ -932,6 +933,17 @@ asmb(void)
 		pph->paddr = INITTEXT - HEADR + pph->off;
 		pph->align = INITRND;
 
+		/*
+		 * PHDR must be in a loaded segment. Adjust the text
+		 * segment boundaries downwards to include it.
+		 */
+		o = segtext.vaddr - pph->vaddr;
+		segtext.vaddr -= o;
+		segtext.len += o;
+		o = segtext.fileoff - pph->off;
+		segtext.fileoff -= o;
+		segtext.filelen += o;
+
 		if(!debug['d']) {
 			/* interpreter */
 			sh = newElfShdr(elfstr[ElfStrInterp]);