diff --git a/libc/arch-arm/bionic/libgcc_compat.c b/libc/arch-arm/bionic/libgcc_compat.c
index f57dfb0..0c91e97 100644
--- a/libc/arch-arm/bionic/libgcc_compat.c
+++ b/libc/arch-arm/bionic/libgcc_compat.c
@@ -152,6 +152,7 @@
     XX(__muldi3)             \
     XX(__mulsf3)             \
     XX(__nedf2)              \
+    XX(__popcountsi2)        \
     XX(__subdf3)             \
     XX(__subsf3)             \
     XX(__truncdfsf2)         \